Cold Lower Legs With No Sensation? Doctor Luo Tianyi’s Cold-Damp Case (Jiajian Bai Tong Tang / Modified White-Communicating Decoction)

Patient search words: cold calves / chilly legs / ice-cold lower limbs / diarrhea with undigested food / cold abdominal pain ｜ Medical terms: han shi xiang he (cold-damp combining) · yang xu han sheng (yang deficiency with exuberant cold) · wan gu bu hua (passing undigested food) · zu jing han (cold shins)

The opening scene: on the march, a 68-year-old marshal suddenly falls ill

The Yuan dynasty was at war with the Song dynasty, and the Yuan army kept pushing south. One day, as the army drew near Yangzhou, one of its commanders — the Vice Marshal of the Southern Campaign (zhengnan fu yuanshuai) — fell ill. His name was Da Te Mo Er, and he was 68 years old.

💬 Note from Doctor Luo: Look — another high official. Yesterday’s case was a marshal; today’s is a vice marshal. And have you noticed: the commanders of the Yuan army were all quite old — yesterday’s marshal was 70, today’s is 68. The ancients said “since antiquity, few men live to seventy” — in those days these were very great ages. That the Yuan army’s field commanders tended to be so old is something a historian might well study; it is quite interesting. As for who was right and who was wrong in the Yuan–Song war, or whose side you take — we make no judgment. We study medicine. When a doctor meets a patient, he treats the illness; that is his calling. Positions and opinions are beside the point.

Who was the patient? A vice marshal of the Yuan army, marching on Yangzhou

This vice marshal was one of the military leaders on the Yuan side during the Yuan–Song conflict. In this campaign he was wu qiu zheng nan — leading troops south that autumn to fight the Song. Doctor Luo Tianyi accompanied the army and moved with it, which is why so many of his cases are stories of treating army commanders in the field. As the vice marshal’s army passed Yangzhou, some ten li out of the city, the illness struck.

💬 Note from Doctor Luo: Most of Doctor Luo Tianyi’s cases were treated in the army camp for its officers. A doctor who serves with the army must treat the men of the army — that is his proper duty. So when you read Doctor Luo Tianyi’s cases, you meet all kinds of “marshals,” “counselors” and “chancellors” — he treated the high officials of the army of his day.

How bad was it? Diarrhea with undigested food — and calves so cold he couldn’t feel a scratch

What was the vice marshal’s illness? The case record says: bing zi li, wan gu bu hua — he had diarrhea, and in the stool were undigested food.

💬 Note from Doctor Luo: Wan gu bu hua — passing undigested food — I have explained this many times: the diarrhea contains food that was never digested. The ancients held that this is mostly insufficient yang qi combined with cold: when yang qi is insufficient, the spleen and stomach cannot do their work of “rotting and ripening the grain and water” (fu shu shui gu). Here is an analogy: vegetables in a pot over a fire slowly cook soft; but if there is no fire, the vegetables in the cold pot simply do not change. When digestive power falls, food is not digested and comes out exactly as it went in — so this is mostly a yang-deficiency condition.

Diarrhea was not all. There was also qi fu leng teng — sharp pain around the navel and abdomen, a cold pain: the colder it got, the worse it hurt, and the pain itself felt cold. And there was zu jing han — his shins and calves were bitterly cold.

How cold? When he scratched his leg, he could not feel it — no sensation of the scratching at all. His lower legs had lost feeling entirely.

💬 Note from Doctor Luo: That is serious. When yang qi is insufficient and qi and blood congeal, qi and blood cannot reach the calves — so scratching brings neither itch nor pain; there is no sensation. The vice marshal had tried his own remedies — he heated stones and warmed himself with them — with no effect. At his wit’s end, he could only summon the imperial physician, Doctor Luo Tianyi.

Where did the illness come from? Age, exhaustion, cold, dairy — and the damp cold of Jiangnan as the last straw

Doctor Luo Tianyi came and began to think through the illness. A physician like him considered the whole picture — the patient’s age, circumstances and way of life all had to be weighed.

The vice marshal: first, nian gao qi ruo — old and weak in qi: at 68 his qi was already insufficient; second, shen ru di jing — deep in enemy territory, fighting every day, with all the burdens of an army, utterly exhausting; third, zhao mu xing han — on the march he slept poorly, and it was deep winter, cold morning and evening, the chill always upon him; fourth, yin shi shi jie — on campaign his meals were irregular, sometimes hungry, sometimes full; fifth, duo yin ru lao — the Mongols consumed a great deal of dairy; sixth, lü yu bei shi — he had come to Jiangnan, a damp region with cold, gloomy winters.

Add these together and the result is: yang bu neng wai gu — his yang qi could no longer protect the body’s surface, and cold-damp began to invade.

💬 Note from Doctor Luo: Cold-damp has a characteristic: dampness tends to flow downward (shi qi qu yu xia) — damp goes down; add cold, and as the saying goes, “cold rises from the feet” (han cong zu xia qi). So when cold-damp attacks, the illness starts from the feet upward, and the calves become especially cold.

Doctor Luo Tianyi’s reasoning: one line from the Neijing — cold-damp combining, and no cure without moxibustion

As always, Doctor Luo Tianyi analyzed the case with the words of the Neijing (the Yellow Emperor’s Inner Classic). The Neijing says: “Gan yu han er shou bing, wei ze wei ke, shen ze wei xie wei tong.” — “When one falls ill from exposure to cold, in mild cases it shows as coughing; when the cold is severe, it turns to diarrhea or pain.” In other words, this is han shi xiang he er wei bing — illness produced by cold and dampness combining.

And the treatment? “Fa dang ji tui han shi zhi xie, jun bu qi yang” — the method should be to repel the pathogenic cold-damp and vigorously tonify the yang. Doctor Luo Tianyi added one blunt statement: “Fei jiu bu neng bing yu” — without moxibustion, this illness will not be cured!

💬 Note from Doctor Luo: You can see that Doctor Luo Tianyi placed extraordinary weight on moxibustion — he considered it the first method for dispelling cold-damp. This is one of his most distinctive ideas. In fact Doctor Li Dongyuan also loved moxibustion — when he treated Yuan Haowen’s brain boil, he first applied moxibustion and only then gave medicine. With Doctor Luo Tianyi the practice developed further. Why was he so skilled with moxibustion? Because of a close friend — Grand Tutor Dou Hanqing (Dou Tai Shi, 窦太师), a figure of real stature in the history of acupuncture and moxibustion, who had taught the imperial princes, excelled at needling, served at the same court, and often exchanged knowledge with Doctor Luo Tianyi. Doctor Luo learned the Grand Tutor’s acupuncture secrets and external treatments. That is why I wrote a piece the other day saying Doctor Luo Tianyi cured illness with “three axes of moxibustion” — he repeatedly used a few fixed combinations of points; sometimes he regarded moxibustion as the main treatment and the herbal decoction as merely supplementary.

First move: nine hundred moxa cones at Qihai (CV6) — the “skin-burning” moxibustion of old, unseen today

How did Doctor Luo Tianyi moxa? “Xian yi da ai zhu yu Qihai xue jiu bai zhuang” — first, with large moxa cones, nine hundred cones at Qihai (CV6).

💬 Note from Doctor Luo: Here I should explain something: the mainstream moxibustion of ancient times was not what we do today — holding a moxa stick at a distance from the skin and smoking it. The ancients were more “brutal”; they believed only direct application worked — direct moxibustion and scar moxibustion were the norm: moxa wool was rolled into a cone, placed directly on the skin and burned. When it burned down to the skin, the skin blistered and burned; they let it slowly suppurate — the more pus, the better — and then gradually heal. During this process the body registers that something is wrong here, mobilizes qi and blood to repair it, and the channels open. Scarring from moxibustion was an ordinary thing on ancient bodies. We would not accept this method today — it hurts, and it leaves scars. Now we use suspended moxibustion, holding the stick at a distance. As for this vice marshal — nine hundred cones at one sitting means a large burned area. But he was a soldier; he did not flinch. I am only introducing the culture of the time.

Why moxa Qihai? To tonify yang deficiency of the lower jiao and invigorate yang qi. Qihai (CV6) stirs up yang qi and original qi. Then he moxaed Zusanli (ST36) — “san qi er shi yi zhuang,” twenty-one cones on each leg (three sevens are twenty-one, as the classics counted) — to treat “cold shins with reversal cold”: regulating the spleen and stomach, warming the channels of the stomach, and letting the legs warm up; Zusanli also guides yang qi downward — are the calves cold? Open the channels and let the warmth through. Then he moxaed Sanyinjiao (SP6) — again on both legs.

💬 Note from Doctor Luo: Why Sanyinjiao? Because the calves were cold, he took points right on the calves; its job was to disperse the cold-damp pathogen felt in the shins. You see how flexible Doctor Luo Tianyi was with moxibustion — yet his point selection still followed a principle: Qihai was valued, Zusanli was valued, and in the “three axes” he swapped Zhongwan (CV12) for Sanyinjiao — selecting points by location. So his moxibustion thinking is really not complicated: a few key points combined flexibly.

The prescription: Jiajian Bai Tong Tang — Zhang Zhongjing’s formula with the soul of “communicating yang” added

Alongside the moxibustion, he also gave a herbal decoction. The formula was called Jiajian Bai Tong Tang — the Modified White-Communicating Decoction (加减白通汤).

Bai Tong Tang (White-Communicating Decoction) comes from the Shanghan Lun (Treatise on Cold Damage) and treats incessant diarrhea in shaoyin disease. The original formula is very simple: ganjiang (dried ginger), fuzi (aconite), plus congbai (scallion white) — the white root portion of the scallion. Ginger and aconite warm the interior; scallion white communicates yang (tong yang) — it can raise yang qi up. This is the formula for the “yang deficiency with exuberant cold” pattern, and Doctor Luo Tianyi modified it.

💬 Note from Doctor Luo: Doctor Luo Tianyi’s prescribing had a signature: everything started from the classics, and the classics guided the formula. He quoted the rule “han yin suo sheng, zhi yi xin re, zuo yi gan ku, yi ku fa zhi” — when the cold pathogen prevails, treat it with pungent-hot herbs, assist them with sweet and bitter herbs, and use the bitter to release. Let us see exactly how he put it together.

Fuzi (prepared aconite root) — greatly pungent and hot; it assists yang, repels yin, warms the channels and disperses cold — the sovereign herb (jun). Then ganjiang (dried ginger) — warms the middle; and guangui (cinnamon bark) — greatly hot, removes cold-damp. These two are hot herbs. With them, baizhu (white atractylodes) and banxia (pinellia) — pungent, bitter and warm, drying spleen dampness — the ministers (chen). These four (dried ginger, cinnamon, atractylodes, pinellia) are the minister herbs, quite precisely matched. Then renshen (ginseng) supports the upright qi; caodoukou (black cardamom) rouses the yang qi of the spleen and stomach and also removes dampness; zhi gancao (honey-fried licorice) — sweet, pungent and greatly warm, warming the middle and boosting qi — these three tonify upright qi and warm yang. Add shengjiang (fresh ginger) — greatly pungent and warm, dispersing the clear-damp pathogen, moving qi, releasing the exterior and scattering cold. Finally congbai (scallion white) — pungent and warm, communicating the yang of the upper jiao — used as the assistant (zuo).

💬 Note from Doctor Luo: The logic is very clear: a pile of warming herbs — aconite, dried ginger, cinnamon, black cardamom; atractylodes tonifies the spleen, pinellia drains dampness; ginseng boosts qi; a little ginger and scallion white on top. The formula warms the middle almost entirely — a perfect match for the pattern of exuberant internal yin cold, heavy cold-damp, and spleen-stomach function impaired. And here is the point to remember: the scallion white in Bai Tong Tang is the finishing touch. Warming yang — anyone can do that. But when you need to communicate — when part of the body has fallen into a “separated” state, especially when one locality is especially cold — you must conduct yang qi to that spot; add scallion white and the effect is excellent. This is the idea Zhang Zhongjing left us, and we can borrow it flexibly today.

A few doses, and the diarrhea stopped, the pain eased, the calves slowly warmed

The vice marshal was seriously ill, so Doctor Luo Tianyi used larger doses. Moxibustion on one side, the decoction on the other — what was the result? “Bu shu fu, xie zhi tong jian” — after only a few doses the diarrhea stopped and the pain lessened; then he gradually warmed — the calves and feet slowly came back to temperature. He then regulated the marshal’s diet, and in a little over ten days he was fully recovered (yu shi yu ri ping fu).

💬 Note from Doctor Luo: But that was not the end of the story. The following autumn the army passed Xiangyang — the Xiangyang that Guo Jing defended in The Legend of the Condor Heroes. Historically this was the decisive battle that sealed the fate of the Yuan and Song dynasties: it was fought over six years, with the city changing hands back and forth, until finally the Yuan army defeated the Song and the Song dynasty collapsed and fell within a few years. Guo Jing and Huang Rong fighting in it is fiction, but the battle itself was extremely bloody. This vice marshal took part in it — you see, the case record matches real history; this is something that actually happened. Even in an army at war there were physicians — healers who treated whoever was sick.

The next autumn: heavy rain at Xiangyang, the old illness returns — one added point cures it again

Passing Xiangyang, the army ran into lin yu — continuous rain, ten-odd days of it. And so qian zheng fu zuo — the vice marshal’s old illness flared up again.

Doctor Luo Tianyi treated him exactly as before: moxibustion — but he added a point, Yangfu (GB38). Yangfu also lies on the leg (look at a point chart: on the outer side of the lower leg). Why add it? Because the legs kept turning cold so easily, and the marshal was very old — he needed to strengthen the power that warms the calves. He moxaed Yangfu with “three sevens” — twenty-one cones on each leg — and continued the original formula. The result: “bu shu fu liang yu” — after a few doses, he was well again.

💬 Note from Doctor Luo: At the end of the case record, Doctor Luo Tianyi also explained how to moxa these points: moxa three cones, then insert the needle a few fen deep — a method that combines needling with moxibustion. Finally he wrote that from then on the vice marshal was cured and, “yi yi dao wei zhong” — came to value medicine greatly — he was almost eager to study Chinese medicine with Doctor Luo Tianyi, and he treated the doctor with even more respect and closeness than before.

Doctor Luo Dalun’s summary: modern people catch cold no less than the ancients

The case is told. What can we learn from it? Doctor Luo Dalun says: situations like this happen all the time today — the amount of cold modern people are exposed to is absolutely no less than in ancient times.

💬 Note from Doctor Luo: The ancients had no air conditioning; we have it. In old times the south was damp and cold — our south is damp and cold too, and without central heating. The ancients had no cold drinks; we have them. The ancients drank dairy products; we buy yogurt and milk in every supermarket and drink them too. Doctor Luo Tianyi, as an imperial physician, treated the wealthy — but people today eat no worse than those wealthy men; we are all “wealthy people” now, with exactly the same chances of being struck by pathogens. Are there many people whose lower limbs are cold? Very many! A lot of people have ice-cold calves. Some people, when they catch cold, get torrents of diarrhea; quite a few have cold abdominal pain. What to do then? Doctor Luo Tianyi’s method is worth studying.

Bonus: how to moxa the “three axes” — suspended moxibustion is enough; don’t imitate the ancients’ skin-burning

Doctor Luo Tianyi valued moxibustion and excelled at warming yang — after completing his studies with Doctor Li Dongyuan he developed the approach further, using yang-warming methods even more, because the people he served were the Mongol troops from the north, where cold injuries were more common. When we learn his moxibustion today, don’t put moxa cones on the skin and burn them — take a moxa stick and use suspended moxibustion.

💬 Note from Doctor Luo: Doctor Luo Tianyi’s “three axes of moxibustion” are Zhongwan (CV12), Qihai (CV6) and Zusanli (ST36). You can try them once a day: first moxa Zhongwan for about ten minutes, then Qihai for ten to twenty minutes, then Zusanli for a few minutes. When you finish you will feel the body heat up at once — a light sweat, warmth all over, as if heat were pouring out from inside the body, the yang qi stirred up; long afterward the body stays warm. That is the power of this combination. If your legs are cold, moxa Zusanli and Yangfu (GB38) and you will feel the legs begin to warm. This set of methods suits modern people very well: for cold-induced diarrhea, add yang-warming herbs and it works even better; if there is no diarrhea, pair it with herbs that warm and tonify the spleen and stomach. You have no chance to consult Grand Tutor Dou — he was a master of antiquity — but Doctor Luo Tianyi consulted him on our behalf; his techniques were used in the clinic, and we can pick them up and use them directly.

There is one more small method: if you buy Fuzi Lizhong Wan (Aconite Center-Regulating Pill, 附子理中丸) from Tongrentang, read the ingredient list and you will find that most of the herbs in Jiajian Bai Tong Tang are right there. If some part of your body is especially cold — cold legs, cold belly, cold limbs — slice a few pieces of ginger and a few scallion whites, boil them in water, and take the pill with that decoction.

💬 Note from Doctor Luo: What we learn is the thinking. One last reminder: daily protection matters enormously — never wait until you are sick to treat the illness. Treating an established illness is slow and difficult, and sometimes truly miserable. When I watched the film Dying to Survive (Wo Bu Shi Yao Shen), I was sick at heart and tears came: when a person falls ill, it is really, truly miserable. So do your health maintenance work — regularly support your upright qi, eat whole grains, tonify the spleen and stomach. When the body is strong and qi and blood are abundant, resistance is high and the chance of illness is small. Prevention is where our effort should be centered. Absorb these ideas of Chinese medicine little by little, learn them, put them into practice in daily life and protect yourself — then what I teach has meaning.

Case source: Weisheng Baojian (Precious Mirror of Hygiene), medical case of Doctor Luo Tianyi (case title: a successful treatment of cold shins); commentary based on public lectures by Doctor Luo Dalun (PhD in TCM diagnostics, Beijing University of Chinese Medicine).