Legs Soft and Weak with No Strength, Feet That Cannot Be Lifted, Muscle Wasting? — Doctor Luo Dalun Presents Doctor Ni Haixia's Fifty-Second Lecture on the Huang Di Nei Jing: the Wei Lun (Atrophy Treatise, Part 2) — Lung Heat Scorches the Leaves and Brings Wei Bi (Atrophy with a Limp); the Heat of Each of the Five Zang Gives One Wei: Heart Heat Vessel Wei — the Feet Cannot Touch the Ground; Liver Heat Sinew Wei — the Knees Cannot Bend; Spleen Heat Muscle Wei — the Muscles Wither; Kidney Heat Bone Wei — Cannot Stand Long; Heat Is the General Root of Atrophy; the Liver Stores Blood — Not in Favor of Cutting the Liver or Embolizing Blood Vessels; Ming Men at the Fourteenth Vertebra, Where Water and Fire Share One Source; a Critique of Contrast Agents for Imaging; the Source of Wei Is the Lung — Loss and Unfulfilled Desires Make the Lung Cry Out; Excessive Grief Collapses the Heart and Blood Appears in Urine; Too Much Ambition and Too Much Sex Loosen the Zong Jin and Bring Sinew Wei with Bai Yin (Involuntary Emission); Damp Injures the Lower Body and Gives Muscle Wei; Long Travel and Toil in Great Heat Lodges Heat in the Kidney and Gives Bone Wei; Looking Diagnosis of the Five-Zang Heat — White Skin with Failing Body Hair, Red with Overflowing Collaterals, Blue-Green with Withered Nails, Yellow with Twitching Muscles, Black with Dried Teeth; to Treat Wei Take Only the Yangming — the Sea of the Five Zang and Six Fu That Moistens the Zong Jin, Where the Chong Mai Meets the Yangming at Qi Jie

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Corresponding topics (medical terms): Su Wen · Wei Lun (Atrophy Treatise, chapter 44), part 2 — the general rule of wei disease: wei is born of heat, the whole essay speaks of one heat; lung heat scorches the leaves, the skin and body hair grow weak, and it becomes wei bi — a limp, unable to walk; the heat of each of the five zang gives one wei: heart qi heat makes the lower vessels reverse upward, the lower vessels become deficient, and vessel wei (mai wei) is born — the pivot breaks, the shank hangs loose and will not bear the ground (the feet are soft and cannot touch down); liver qi heat drains the gallbladder into a bitter mouth, the sinews and membranes dry, the sinews cramp and contract, and sinew wei (jin wei) is born (the knee cannot bend and stretch); spleen qi heat dries the stomach and brings thirst, the muscles become numb, and muscle wei (rou wei) is born; kidney qi heat makes the lower back and spine unable to rise, the bone withers and the marrow is reduced, and bone wei (gu wei) is born (cannot stand long); the heart governs blood and vessels — when blood-heat moves downward the feet and shanks are strong; in vessel wei the feet cannot bear the ground; the liver stores blood — the warehouse analogy, opposition to liver surgery and vessel embolization, the liver regenerates after resection while embolization blocks blood renewal and injures for life; the heart generates blood, the liver stores blood, the spleen governs blood; the liver is jue yin, blood is washed through the lung and becomes yang, lung fluid moistens the heart; the gallbladder and liver are interior-exterior, belonging to shao yang, liver heat drains the gallbladder and bitter bile rises into the mouth; the spleen and stomach are interior-exterior — the stomach is yang, the spleen yin, the stomach holds fluid, spleen heat dries the stomach and brings thirst; the kidney governs bone and generates marrow, Ming Men sits at the fourteenth vertebra where water and fire share one source, fire that burns slowly lengthens life, and the kidney receives the yin essence of the lung and the fire of Ming Men, so the bone marrow grows; bone wei differentiation — a critique of X-ray contrast agents, pattern differentiation judges from symptoms; the source of wei is the lung — the lung is the chief of the zang and the cover of the heart; loss and unfulfilled desires make the lung cry out, lung heat scorches the leaves, and the five zang each develop wei from that scorched lung — echoing the Cough Treatise: cough begins in the lung, and after a long time transmits through the nine coughs to the fu (coughing up urine); excessive grief severs the pericardium collaterals, yang moves within, the heart collapses, and blood appears in the urine (the pericardium locks yang inside with fluid; when the pericardium’s qi is insufficient, yang scatters); unbounded thought, unfulfilled wishes, lustful imagination and excessive intercourse loosen the zong jin and bring sinew wei with bai yin (involuntary emission); the zong jin sits at the penis and vagina, and sinew wei is born in the liver (the liver channel circles the genitals); gradual damp, work in water, and living in wet places injure the lower body and give muscle wei — damp-dispelling herbs must be guided downward (Shen Nong Ben Cao Jing and Jin Gui), and the spleen governs damp in a moderate measure; long travel, toil and thirst in great heat let yang attack within and lodge heat in the kidney, giving bone wei — carrying heavy loads depends on the kidney (Dazhu BL11 and Juegu GB39), lung fluid should generate the kidney, and when heavy sweat exhausts the lung fluid, water cannot overcome fire, the bone withers and the marrow empties, and the feet cannot bear the body; looking diagnosis of the five-zang heat — lung heat shows white skin with failing body hair, heart heat redness with overflowing collaterals, liver heat a blue-green face with withered nails (nails are the surplus of sinews), spleen heat yellow skin with twitching muscles (yellow nourishment no longer stored), kidney heat a black face with dried teeth (teeth are the surplus of bone, hair the surplus of blood); to treat wei take only the yangming — the yangming is the sea of the five zang and six fu, it moistens the zong jin, and the zong jin binds the bones and benefits the joints; the Chong Mai, the sea of the channels, pours through the valleys and meets the yangming at the zong jin; all yin and yang meet at qi jie (qi street), with the yangming as their leader, all connected to the belt vessel and the governing vessel; when the yangming is deficient the zong jin goes slack and the belt vessel does not lead, so the feet are weak and useless; from Zusanli ST36 up to Chongmen SP12 and Qichong ST30 is where the yangming qi flows most vigorously

Opening: last time we said "wei is atrophy" — now Bo Qi takes it apart: where does wei actually come from?

The last lecture opened the Atrophy Treatise, and Doctor Ni said it plainly: wei means atrophy — when the muscles, the arms, the legs waste away, that is wei. In this lecture, Bo Qi answers the most important question: how does a person develop wei? The answer is one single word — heat.

💬 Note from Doctor Ni: This essay discusses where wei comes from, how to treat it, and how to diagnose it. The whole essay speaks of one heat — of the yin-yang, exterior-interior, deficiency-excess, cold-heat of Chinese medicine, the heat discussed in this essay is very special. Earlier, when we lectured on the Cough Treatise, it opened the door straight away: cough first attacks the lung. Wei disease, by contrast, arises in heat. If you understand the cause of wei disease and nip it in the bud — the moment the disease starts you strike — there will be no wei syndrome at all. That is the key point of this essay.

First, a piece of common sense: hot air rises, and cold air slips in under the door — that is the balance of yin and yang

Before talking about disease, Doctor Ni asks everyone to look at a "normal state" — what a healthy person looks like. He tells everyone to run a small experiment at home: boil a pot of hot water.

💬 Note from Doctor Ni: If you do not understand, boil a pot of hot water at home and watch whether the steam rises. If you boil hot water in your house and the steam goes down instead, come tell me — I will go see what is going on. How do you know about the circulation of qi and blood? It is simple: when you boil water, the heat keeps rushing upward, and if you touch under the crack of the door, cold air slips in — because the inside is hot, the cold is pushed out. This is the natural state of yin and yang balancing each other.

The chest is yang; below the diaphragm is yin. Yin must come down from above, pass through the body’s filtering, and only then is it good yin; if it accumulates inside without being filtered, that is "yin accumulation," and it makes people sick. Breathing works the same way: exhaling carbon dioxide and inhaling oxygen is metabolism — the light yang qi stays in the body, and the turbid qi goes out.

Lung heat scorches the leaves, then wei bi: keep burning after the water is boiled dry, and a person goes lame

What happens when the lung is too hot? In the normal state the lung is cold (the lung models heaven, and heaven is cold); now the fluid inside the lung is gone, and on top of that comes the heart’s heat — heat on top of heat — so the skin and body hair grow weak. Doctor Ni goes through this passage word by word:

💬 Note from Doctor Ni: When your lung is too hot, the fluid inside the lung is gone, and on top of that comes the heat of the heart — heat added to heat — and at this time the skin and body hair become weak. It is like a fire burning: the water is boiled dry and still it burns — that is how things get scorched. At this point it becomes wei bi — the word is pronounced "bi," and bi means a limp, walking with one leg dragging, a limping gait.

Heart qi heat, then vessel wei: the foot cannot be lifted, and the moment it touches the ground it folds

After wei bi, Bo Qi goes through the five zang one by one — the first is the heart.

💬 Note from Doctor Ni: When heart qi is hot, the lower vessels reverse upward; when they reverse upward the lower vessels become deficient, and deficiency gives birth to vessel wei. The heart keeps beating and generates heat; the heart is fire, and when it meets cold, it relies on the lung’s constant breathing to move the heart’s heat down into the small intestine — the heart’s heat enters the small intestine through the blood vessels, because the heart governs the blood vessels; these vessels do not just carry blood down, they also pour the heart’s heat into the small intestine. If the heart’s heat does not come down, the heart heat reverses upward instead, and only then does wei develop.

The symptom of vessel wei, Doctor Ni describes very concretely: the foot cannot be lifted, and it cannot touch the ground — the moment you put it on the ground it folds, without strength to step down, because the strength of the two feet lies in their blood vessels: the heart’s blood keeps flowing downward, and only then are the feet strong. Now the vessels atrophy, and the feet go soft.

Liver qi heat, then sinew wei: the knee cannot bend — "if you treat a knee for ages and it will not improve, do not blame rheumatism"

The second is the liver. When liver qi is hot, the gallbladder drains and the mouth is bitter, the sinews and membranes dry, the sinews cramp and contract, and it becomes sinew wei.

💬 Note from Doctor Ni: When liver qi is hot, the gallbladder drains and the mouth is bitter, the sinews and membranes dry, the dried sinews cramp and contract, and it becomes sinew wei. In sinew wei the foot cannot bend and stretch — this is different from vessel wei: in vessel wei the foot cannot step on the ground, the moment you put it down it folds; in sinew wei, it is the knee that cannot bend. Clinically, whenever you see a knee problem — apart from rheumatic arthritis — and the knee itself cannot move well, you treat it with acupuncture and with herbs, and after all that treatment the knee still will not improve — that is not rheumatism, that is a sinew problem, a liver problem; the sinew has atrophied away.

Why does liver qi become hot? Doctor Ni takes the opportunity to explain the liver’s function: the liver stores blood. The liver does not store blood and lock it away forever — that would mean death. The liver is a great warehouse: things come in and go out; what comes in is living matter, and what goes out is essence.

💬 Note from Doctor Ni: So we very much do not approve of cutting into the liver with a knife, or doing a vessel embolization. Why? Because the liver itself stores blood. Now there is a great warehouse that originally stores many things, letting them come in and go out; today you suddenly cut a piece out of the warehouse — how can it store? The human body is so precise that if you cut a piece out, it slowly grows back — even if you cut it down to half, or a tenth, it still slowly grows back, and there are records of it growing back in six months. But if it is liver disease, liver cancer, and you embolize it, then when the body renews itself, that part can never renew — the blood cannot renew, it is stuck there forever — embolization causes lifelong injury. For us it is already difficult enough; if you do not touch it and we Chinese doctors take over, it is fine, but once you have cut it, it is troublesome for Chinese medicine to handle.

A bonus on how the organs divide the work: the heart generates blood, the liver stores blood, the spleen governs blood — a bitter mouth means the gallbladder

Next Doctor Ni explains the whole story of blood: the heart generates blood, the liver stores blood, and the spleen governs blood.

💬 Note from Doctor Ni: The liver is the place that stores blood — the liver’s hua wu chu yan: the liver metabolizes the body’s toxins. The blood enters the heart, but this blood itself is not yet fine; the liver is a jue yin place with very little yang. After the blood comes in, it passes through the washing of the lung and only then becomes yang. The heart beats vigorously, so the heart generates blood; the blood that comes in is the dirty blood of the zang, and after it passes through the liver and comes out, it becomes blood of fine quality for the heart; when it reaches the heart, with the lung’s fluid to moisten it, yang qi enters the heart, and the heart generates blood — this is the process of how blood is steamed and transformed in the body.

When liver qi is hot, the liver swells. The gallbladder and the liver are interior-exterior to each other; the gallbladder is a shao yang place — a little yang, a place that stores blood. When the liver swells, bile reverses and flows upward, reaches the mouth, and the taste in the mouth is bitter. Doctor Ni gives a vivid example: wood that has been burned is always bitter — bile is bitter.

💬 Note from Doctor Ni: The gallbladder is where wood generates fire; wood that has been burned is always very bitter. Put a piece of wood in your mouth and taste it — then you know the gallbladder is bitter. When a person’s mouth is bitter, it is the gallbladder — that is the whole story, finished.

Spleen qi heat, then muscle wei: the stomach dries and thirsts, the muscles go numb, and the flesh withers

The third is the spleen. When spleen qi is hot, the stomach dries and thirsts, the muscles become numb, and it becomes muscle wei. The spleen and stomach are interior-exterior: the stomach is yang, the spleen is yin, and because there is yin, the stomach holds fluid.

💬 Note from Doctor Ni: The spleen and stomach are very close, stuck together. The stomach is yang, the spleen is yin; because there is yin, our stomach holds fluid. If the spleen is hot — the spleen qi too hot — the fluid is gone, it affects the stomach, and the stomach becomes very dry. The spleen governs the muscles — compare heaven-and-earth with the human body: the spleen is like the earth’s soil; what soil is to the earth, muscle is to the human body, and the spleen manages it. When the spleen is too hot, the fluid inside the muscles is also gone, the muscles become numb, and it becomes muscle wei — the flesh atrophies away.

Kidney qi heat, then bone wei: the lower back and spine cannot rise, the bone withers and the marrow is reduced — why do some people cannot stand long?

The fourth is the kidney. When kidney qi is hot, the lower back and spine cannot rise, the bone withers and the marrow is reduced, and it becomes bone wei — a person with bone wei cannot stand for long.

💬 Note from Doctor Ni: The bone has strength because there is water inside it; if there is no water, or not enough water, the person cannot stand for long. You see many people with blood cancer, brain tumors, or problems in the internal organs with diseased bones — none of them can stand long; as soon as they stand, they have to sit down quickly. So a person who can stand for a very long time has no problem with the bones.

Why does heat in the kidney wither the bone? Doctor Ni draws a picture: the governing vessel (Du Mai) reaches the fourteenth vertebra, which we call Ming Men — the Gate of Life. At Ming Men there is fire, and on both sides there is water. The fourteenth vertebra is where water and fire share the same source.

💬 Note from Doctor Ni: Two waters on the sides, one fire in the middle — the fire burns slowly; you cannot burn it too fast, and life will be very long. The kidney receives the yin essence from the lung to moisten it, and with the fire beside it, the bone marrow grows very well. If the kidney is too hot, the fluid is injured, and of course it affects the bone marrow; once the marrow atrophies and its strength is insufficient, it becomes bone wei.

A bonus critique: without an X-ray, how do you know the bone has atrophied? — judge from the symptoms, no contrast agent needed

Someone will ask: teacher, without an X-ray, how do we look inside the bone? Doctor Ni’s answer is short and crisp: you do not need to look.

💬 Note from Doctor Ni: No need to look — you can judge from the symptoms: a person with bone wei keeps wanting to sit; if he can still stretch the foot and the knee has no problem, then it is not sinew wei — you can tell from these symptoms. See — by the time you read this far in Chinese medicine, forty-four essays in, everyone knows that Chinese medicine is pattern differentiation; there is no need to go in and look. If you make a great fuss and go look, you may injure the body. Often patients get contrast agents for examinations — Westerners’ contrast agent, the moment it is injected, before the scan even starts, or during the scan, the person collapses on the bed, or problems develop some time after the scan — there is no need to do that; you can get everything from the symptoms.

Why does the lung become hot? — "loss and unfulfilled desires": the true source of wei is the lung

The Yellow Emperor asks: why is it so? Why does the lung become so hot? Bo Qi answers — this passage is the key of the whole essay (page 373).

💬 Note from Doctor Ni: The lung is the chief of the zang, dwelling in the highest place, and is the cover of the heart. When there is loss and unfulfilled desires, the lung cries out; when the lung cries out, the lung heat scorches the leaves; when the lung heat scorches the leaves, the five zang, because of that scorched lung, each develop wei bi. So the true source of wei disease is the lung!

Doctor Ni stresses those four words, "unfulfilled desires" — what you want, you cannot get: you want promotion and cannot rise, you want wealth and cannot make it; a fire of frustration builds in the heart, the fire goes upward, and injures the lung. So to treat wei, first you must put out the fire in the heart.

💬 Note from Doctor Ni: When we lectured on the Cough Treatise, the same thing: your cough begins with the lung being attacked. You cough and cough, and if after one cycle it does not improve, it turns into liver cough, spleen cough, then reaches the kidney, then the heart, then returns to the lung; when the zang have not been cured, it transmits to the fu. You often hear patients complain: "Doctor, every time I cough I urinate" — that is always a chronic cough; only a chronic cough transmits from the fu to the bao. Cough arises in the zang, and wei also arises in the zang; the very first cause is the lung. So all of you must protect the lung and keep the lung in good condition.

Excessive grief, then the heart collapses and blood appears in the urine: the pericardium locks the "yang" inside

On page 373, Bo Qi discusses the second cause of disease — emotion injuring the body.

💬 Note from Doctor Ni: When a person grieves excessively, the bao luo (the pericardium collaterals) are severed — bao luo refers to the pericardium. So a person must not grieve too much; with too much grief the pericardium is severed. When the pericardium collaterals are severed, yang moves within; when it breaks out, the heart collapses — as if the heart jumps out of the chest — and at this time blood can be seen in the urine. So the Ben Bing Lun says: when the great channels are empty, it becomes muscle bi (numbness) and transmits into vessel wei. This starts from the heart — when the heart has a problem, it later continuously affects the spleen and the other zang; the blood vessels atrophy, and the foot cannot touch the ground.

Why is the pericardium so important? Doctor Ni uses a car engine as an analogy: the heart is yang, it is energy, it is motive force — this yang must have something to control it.

💬 Note from Doctor Ni: You have an engine, the pistons and everything are fine, but there is no cover on it — the oil splashes everywhere, and the heat and motive force cannot be contained. The pericardium means locking the yang inside. Between the pericardium and the heart there is a layer of fluid — in the Chinese medical view, it is pure white clear water, very clear. With the membrane and the clear water, the heart’s yang can be secured inside, and the heart yang will not scatter outward. If the heart yang scatters outward, the whole body starts jumping — nothing fixes it: the heart jumps once, your whole body jumps once, and all the yang scatters away. So when the qi of the pericardium collaterals is insufficient, yang moves within.

Too much ambition, too much sex, then the zong jin goes slack: sinew wei and bai yin (involuntary emission)

The third cause is about desire and sex.

💬 Note from Doctor Ni: Unbounded thought, unfulfilled wishes, lustful imagination outside, and excessive intercourse — this is ambition that is too big. I want to buy an airplane — there are not many people in the world who can buy an airplane; my ambition is too big and I cannot achieve it — this kind of emotion injures the body. With excessive sexual activity, the zong jin goes slack, and it develops into sinew wei and bai yin — bai yin is the man’s involuntary seminal emission; without any sexual desire the seminal fluid drips out, because the zong jin has atrophied.

Doctor Ni also clarifies where the zong jin sits:

💬 Note from Doctor Ni: The zong jin is in the lower part of our body — in men it is the region of the penis, in women the middle area around the vagina and genitals. When a woman is one month pregnant, the pubic bone opens so the child can pass through, because the zong jin is here. If you have excessive intercourse, the zong jin relaxes, there is no strength in the middle, and it develops into sinew wei. Sinew wei is born in the liver — because only the liver channel lands in this region; the liver’s channel falls on the zong jin, so the root of sinew wei is the liver.

People who work in water, then muscle wei: damp injures the lower body, and damp-dispelling herbs must be "guided" down to the feet

The fourth cause is tied to occupation — people who earn their living in dampness.

💬 Note from Doctor Ni: Some people work with water as their business — people who work in water, rice farmers, vegetable growers, people who dig for lotus roots in the water, living long-term in wet places. Damp, Chinese medicine holds, injures the lower body. Why do you need to know that damp injures the lower body? First, it helps differentiation: when you look down and see problems in the legs, knees, hip joints, ankle joints — that is damp. Then we have damp-dispelling herbs — how do you make the damp-dispelling herbs go nowhere else but straight to the feet? These herbs are all in the Shen Nong Ben Cao Jing and the Jin Gui — knowing this will later help us write prescriptions. Otherwise you prescribe wrongly: the damp that should go down does not go down, and your formula is not good; the guiding herb pours it somewhere else — because the spleen likes damp, if you do not clear the spleen’s damp, it instead makes the stomach too hot.

💬 Note from Doctor Ni: Muscle wei comes from damp places — the spleen itself governs damp, but this "governing damp" is not "the more the better"; it is a fixed amount: too much is no good, too little is no good, it must be in the middle. This relies on the five zang and six fu balancing each other evenly, so it stays there evenly.

Long travel, toil, thirst in great heat, then bone wei: carrying heavy loads depends on the strength of the kidney

The fifth cause is physical labor injuring the kidney. Doctor Ni tells a story full of images:

💬 Note from Doctor Ni: Fifty or sixty years ago in Taiwan, many fishermen from Yilan, after catching fish, would climb over mountains and cross the ridges to come to Taipei, exchanging things in Mengjia. When there is long travel and toil, meeting great heat — running in the mountains in hot weather, sweating and parched — yang attacks within, and heat lodges in the kidney. Laborers who carry heavy loads for a long time: the yang goes deep, reaches the lung, and then the heat lodges in the kidney.

Why does carrying heavy loads depend on the kidney? Doctor Ni offers another piece of knowledge — the Dazhu point and the Juegu point.

💬 Note from Doctor Ni: We can stand up carrying a carrying pole because the bone has strength: the bone of the shoulder meets the Dazhu point BL11, and the feet have strength through Juegu GB39 — one is Dazhu above, one is Juegu below; this is why the shoulder can carry heavy loads. Sometimes you cannot lift with the hand, so you carry with the shoulder — that is the prenatal strength issued by the kidney. The lung’s fluid should normally generate the kidney; but you toil carrying heavy loads, running under a great hot sky, sweating a lot, the lung fluid is insufficient, and when the fluid is insufficient the heat transmits to the kidney; carrying for a long time relies on the kidney’s handling, and when the kidney’s fluid is also insufficient, it makes the kidney hot — water cannot overcome fire — causing the bone to wither and the marrow to empty, unable to stand long, and it develops into bone wei. Bone wei is born of great heat. See? Now all of you have the idea: heat is what produces wei.

How do you tell which zang’s heat it is? — looking diagnosis: look at the color, the body hair, the nails, the teeth

The Yellow Emperor asks again: how do we differentiate the symptoms above? Bo Qi’s answer relies entirely on a pair of eyes — looking diagnosis.

💬 Note from Doctor Ni: Lung heat shows white skin and failing body hair — below the eyebrows is white, and the body hair also fails. Heart heat shows redness with overflowing collaterals — the face is red; the collaterals are the tips at the hands and feet; overflowing collaterals means the hands and feet swell. Liver heat shows a blue-green face with withered nails — the face is bluish, and the fingernails wither. Our nails are the surplus of the sinews; the liver governs the sinews of the whole body; when it is too hot, the nails atrophy, dry out, crack. Spleen heat shows yellow skin with twitching muscles — originally yellow belongs to the spleen’s nourishment; it should enter the spleen, be stored inside, and supply the energy of the muscles; now it is too hot and will not store it, so the yellow nourishment soaks through to the surface and looks yellow; the spleen governs the muscles, and the muscles twitch because a fire is burning there, so the muscles move. Kidney heat shows a black face with dried teeth — the teeth are the surplus of the bone.

Doctor Ni closes with a summary of the "three treasures of looking diagnosis": look at the fingernails and you know the liver; look at the teeth and you know the kidney; look at the hair and you also know the kidney (hair is the surplus of blood) — everything that the body shows on the outside can be read for symptoms.

Wrapping up: why do we treat wei by taking only the yangming? — the yangming is the sea of the five zang and six fu and moistens the zong jin

The Yellow Emperor asks the most important question of the whole essay: you have said so much — why does the treatment of wei disease take only the yangming? What is the reason? Bo Qi’s answer is the general treatment principle of the Atrophy Treatise.

💬 Note from Doctor Ni: The yangming is the sea of the five zang and six fu. After we eat the five grains, the essence qi that the body transforms all travels on the yangming channel. The yangming moistens the zong jin, and the zong jin binds the bones and benefits the joints — at all the joints of the body, besides the sinews (the membranes managed by the liver) holding things in place, the zong jin also binds the joints in the middle, so that we can move and the joints can bend and stretch — that is "benefiting the joints." The Chong Mai is the sea of the channels, pouring through the valleys, and meets the yangming at the zong jin; all yin and yang meet at the zong jin, meeting at qi jie (qi street), with the yangming as their leader, all connected to the belt vessel and the governing vessel. When the yangming is deficient, the zong jin goes slack, the belt vessel does not lead, and therefore the feet are weak and useless — the meaning is right here.

Finally, Doctor Ni lands this passage on the points, teaching everyone how to "see" the yangming channel:

💬 Note from Doctor Ni: The Guanyuan point CV4 — the Chong Mai runs inside, ending at Guanyuan; the Chong Mai is blood, with very much blood inside, reaching the knees, and coming down is Zusanli. The yangming stomach channel starts from Zusanli ST36, and on the upper leg the muscles stand up, all the way up to Chongmen SP12 and Qichong ST30. This whole region is where channel qi flows most vigorously, where yangming qi is strongest — so when you treat wei, taking the yangming channel is exactly right.

One sentence closes the whole lecture: the root of wei is heat, and the heat begins in the lung; each of the five zang gives its own wei, each with its own looking-diagnosis marker; and the great method of treating wei is to take only the yangming. To treat wei, first put out the fire in the heart, then nourish the qi of the stomach channel — this is the key the Wei Lun leaves to posterity.

What to take away

Wei means atrophy, and atrophy is born of heat: the whole Wei Lun speaks of one heat; nip it in the bud the moment it starts — the disease of the muscles, arms and legs all begins with heat.
The five zang heat, five kinds of wei: heart heat vessel wei — the feet cannot touch the ground (they fold as soon as they land); liver heat sinew wei — the knee cannot bend (a knee that will not improve after long treatment is not rheumatism but a sinew/liver problem); spleen heat muscle wei — the stomach dries, the muscles go numb and wither; kidney heat bone wei — the lower back cannot rise, the bone withers, and the person cannot stand long (people with blood cancer, brain tumors or diseased bones cannot stand long).
The liver is a great warehouse of blood: Doctor Ni strongly opposes cutting the liver or embolizing its vessels — a cut grows back in six months, but an embolized part can never renew its blood and injures for life.
Ming Men at the fourteenth vertebra: water and fire share one source — fire that burns slowly makes life long.
No contrast agents needed: Chinese medicine is pattern differentiation — judge bone wei from the symptoms; contrast agents can collapse a person on the table.
The true source of wei is the lung: loss and unfulfilled desires make the lung cry out, the lung heat scorches the leaves, and the five zang each develop wei from it — just as cough also begins in the lung. To treat wei, first put out the fire in the heart.
Emotion and desire injure: excessive grief severs the pericardium and blood appears in urine (the pericardium locks the heart’s yang inside with clear fluid); too much ambition and too much sex loosen the zong jin and bring sinew wei with bai yin (involuntary emission) — the root of sinew wei is the liver.
Damp injures the lower body: people who work in water develop muscle wei — damp-dispelling herbs must be guided down to the feet; the spleen governs damp in just the right amount, neither too much nor too little.
Toil in heat injures the kidney: carrying heavy loads depends on kidney strength (Dazhu BL11 above, Juegu GB39 below); when heavy sweat exhausts the lung fluid, water cannot overcome fire and the bone withers — bone wei is born of great heat.
Looking diagnosis of the five-zang heat: lung heat white skin and failing body hair, heart heat red face with swollen hands and feet, liver heat blue-green face and cracked nails, spleen heat yellow skin with twitching muscles, kidney heat black face and dried teeth — nails tell the liver, teeth and hair tell the kidney.
Treat wei by taking only the yangming: the yangming is the sea of the five zang and six fu and moistens the zong jin; from Zusanli ST36 up through Chongmen SP12 and Qichong ST30 the yangming qi flows most vigorously — when the yangming is deficient the feet are weak and useless, so nourishing the stomach channel is the way.

Based on Doctor Ni Haixia’s Ren Ji (Human Records) Huang Di Nei Jing lecture series (Lecture 52), presented by Doctor Luo Dalun.