Burning Heat and Night Coughing You Can’t Sleep Through? Doctor Zhang Xichun’s Case of a Student with Labor-Heat Cough
Search terms this page answers: body running hot / coughing at night / can’t sleep because of the cough / fever every afternoon / fever all night / getting thinner and thinner
Medical terms: labor-heat cough · consumption · yin deficiency fever · rapid pulse (a pulse rate that is too fast)
Opening: an 18-year-old student burned with fever all night and couldn’t lie down to sleep
Our patient today is an 18-year-old student — the son of a family surnamed Xu in Lincun village, the next village over from Doctor Zhang Xichun’s hometown. At the time he was still studying.
💬 Note from Doctor Luo: This illness is called labor-heat cough (lao re ke sou). “Labor” (lao) means the body is weakened and run down; “heat” (re) tells us Doctor Zhang Xichun judged this a heat condition; “cough” (ke) is the main symptom. This is not a minor problem — the coughs Doctor Zhang Xichun treated are the stubborn, deep coughs that appear when the body is exhausted to a serious degree and the damage is concentrated in the lungs. I’ll tell you, many elderly people in Northeast China are exactly in this situation — that kind of stubborn cough is genuinely hard to cure. That’s why the thinking in this case record is so important.
How sick was this student? Every night he ran a fever that lasted the whole night through — his body burned so hot he couldn’t bear it, and only when he sweated a little toward dawn did the heat finally retreat. During the day the cough wasn’t so bad, but at night he coughed so violently he couldn’t lie down to sleep at all — he could only sit up.
Who was the patient? A boy who failed his exams and studied his way into illness
How did this boy fall ill? The story is a little heartbreaking — he was fiercely strong-willed by nature. At the year-end school examinations, this boy, who usually did well, didn’t do well this time and failed to rank at the top.
💬 Note from Doctor Luo: He wasn’t satisfied with the result, so he threw himself into his books and studied with desperate intensity. This is what Chinese medicine calls overusing the mind (lao xin guo du). Never imagine that thinking costs nothing — it doesn’t. Chinese medicine says “overwork injures heart blood” and “excessive worry injures the spleen.” Using your brain too hard consumes heart blood. And to make it worse, this student was newly married — in those days people married young, and at 18 he already had a family. A newlywed young man who doesn’t know how to conserve himself drains his kidney essence. Overwork draining heart blood, plus indulgence draining kidney essence — put the two together, and when spring came, trouble broke out.
Why does trouble break out in spring? Because spring yang stirs (chun yang fa dong): in spring the wood of the liver begins to rise and grow, and at that moment it needs the nourishment of kidney essence and kidney water. If the kidney essence is insufficient and can’t keep up, fire flares in the upper burner, and gradually this turns into labor-heat cough.
How sick was he? Regular afternoon fever, and panting at the slightest movement
Doctor Zhang Xichun recorded this student’s symptoms in detail:
- Tidal fever in the late afternoon (ri bu chao re): between 3 and 5 pm (the shen hour), his body ran a fever right on schedule — fever that rises and falls with rhythmic regularity like the tide is called tidal fever;
- Burning heat all night: fever throughout the night, easing only with a little dawn sweat;
- Night cough that made lying down impossible: mild cough by day, but at night he coughed so hard he couldn’t lie flat;
- Loss of appetite and emaciation: appetite worse and worse, body thinner and thinner;
- Shortness of breath on the slightest exertion: the least movement and he was panting, his heart pounding loudly and fast, then gasping for breath.
💬 Note from Doctor Luo: This clearly shows a body weakened to a serious degree. Now feel the pulse: both wrists were thin and weak, and pressing deeper the pulse had no root — press down and there’s nothing underneath, which shows the kidney qi is insufficient. Even more alarming was the rate — the pulse beat more than seven times per breath. Strictly speaking, modern people can’t be compared one-to-one with ancient people on beats per breath: the ancients labored more, were fitter, had stronger heart function, so their pulses ran slower; modern people are constitutionally weaker, exercise less, and their resting heart rates are naturally a bit faster. So in ancient terms, six beats per breath was already considered high — a sign that the body is very depleted; and seven beats per breath, Doctor Zhang Xichun believed, was basically an illness beyond recovery — the heart is racing so fast that it shows the upright qi can’t hold on and the heart is running itself ragged. This patient was already past seven beats, and Doctor Zhang Xichun said plainly: this is truly hard to treat.
Doctor Zhang Xichun’s key judgment: dry stools were actually good news
Hard to treat though it was, Doctor Zhang Xichun saw a ray of hope. The student still had a fairly decent appetite — it was beginning to decline, but he could still eat; and his stools were dry.
💬 Note from Doctor Luo: Doctor Zhang Xichun added a special annotation here: in this kind of illness, slippery diarrhea is the taboo sign. Loose, slippery stools (la xie) mean the spleen and stomach are weak — the spleen can’t hold things in and the upright qi is insufficient, and that kind of illness is extremely hard to treat. By contrast, dry stools show that the spleen and stomach still work, that they can still hold things in, and that the upright qi hasn’t completely collapsed — so this illness can be treated. That’s why Doctor Zhang said: quickly give a formula that heavily tonifies true yin (jun bu zhen yin) — true yin, in my reading, is essence: kidney essence, liver-kidney essence, the essence of the five viscera, with kidney essence the most important of all; and pair it with agents that astringe and assist qi transformation (shou lian qi hua) — pull things back inward and help the qi do its work.
The prescription: Chinese yam leads the charge — tonify on one side, astringe on the other
For the first formula, Doctor Zhang Xichun’s opening herb was his old standby — sheng huai shan yao, 30 g (one liang).
💬 Note from Doctor Luo: That’s the dried yam slice, and it must be huai yam — the iron-stick yam grown on the hard, rocky loam of Wen County in Jiaozuo, Henan. That’s the genuine article. Chinese yam strongly tonifies the lung, spleen and kidney — this is Doctor Zhang Xichun’s secret method: whenever he treats a lung condition, I’ve noticed in his cases, he basically always uses sheng huai shan yao, and in large doses, up to one liang. When you study a famous physician, you must study which medicines he was especially skilled at using. Why did Doctor Zhang Xichun become famous? He mastered the use of herbs exceptionally well — he started from the medicines themselves, pondered each herb carefully, tasted its nature thoroughly, and only then studied the formulas of the Shang Han Lun, which brought these herbs to life. That was his ladder to becoming a great physician: first, understand every single herb.
Next came da gan gou qi (sweet, large wolfberry), 24 g (eight qian) — sweet, plump goji berries that tonify the essence of the liver and kidney. Doctor Zhang Xichun constantly paired yam with wolfberry: yam greatly tonifies the lung, spleen and kidney channels, with the emphasis on the spleen; wolfberry tonifies the essence of the liver and kidney. Both are essence-tonifying herbs, warm in nature — in Doctor Zhang’s words, both tonify true yin.
Then xuan shen (figwort root), 18 g (six qian).
💬 Note from Doctor Luo: Xuan shen clears heat and nourishes yin; it can draw the kidney water upward to benefit the throat — which is why, when we treat a sore throat or swollen throat, we often add sheng di and xuan shen. Why did Doctor Zhang Xichun also love adding xuan shen when treating lung disease? He explained it specially: although xuan shen looks black on the outside, its core is hollow, and that core is white — white enters the lung, so xuan shen can clear dry heat from the lung and resolve toxin and fire. Here’s a fun detail: Doctor Zhang said that the xuan shen you see in shops is all black because the pharmacies dyed it with water boiled from black soybean skins — even in the Republican era, pharmacies were already adulterating Chinese medicines, which is why Doctor Zhang paid so much attention to how to identify genuine herbs at the pharmacy.
He then paired it with sheng huai di huang — which nourishes yin and cools the blood, especially the kidney yin; sha shen to nourish yin; and gan cao, 9 g, to harmonize the middle. Then came the astringing group: sheng long gu (raw dragon bone, pounded), 18 g — Doctor Zhang Xichun had an interesting habit: he rarely used calcined dragon bone, always raw, because he believed raw dragon bone already possesses astringent power. This student’s qi was floating and rootless, escaping outward, so he tonified and astringed at the same time, using dragon bone to pull the qi back in. Jing yu rou (cornus fruit), 18 g — this also tonifies the essence of the liver and kidney, similar to wolfberry but more powerful, with its point of action on the liver channel; it’s intensely sour, and sourness astringes.
Also sheng hang shao (white peony root), 9 g — white peony can gather the floating heat of the upper burner and drain it out through the urine, because it promotes urination. Together with the yu rou and the yam, these are all sour, astringent herbs.
💬 Note from Doctor Luo: Why all this astringing? Because his qi mechanism couldn’t hold together, and that’s why he coughed without stop. This kind of cough is definitely a rootless, deficient cough — completely different from a vigorous external-contraction cough. When kidney qi is insufficient, when the kidney qi has no root, the qi mechanism escapes outward, and this cough is a hollow one. What to do? Astringe — tonify on one side and pull inward on the other.
The formula also contained two herbs that Doctor Zhang Xichun took the trouble to mark “pound it” — wu wei zi (schisandra), 9 g, and niu bang zi (burdock seed), 9 g.
💬 Note from Doctor Luo: This is the first time we’ve given wu wei zi real attention. It actually contains all five flavors — bitter, sour, sweet, pungent, and salty. Why does the wu wei zi we boil at home taste only sour? Because it wasn’t pounded — the skin is intensely sour, and the other flavors inside can’t come out. Once pounded and boiled, all five flavors emerge. Doctor Zhang Xichun paid special attention to schisandra: unpounded, it astringes directly and pulls inward; pounded, it astringes with the sour while the pungent interior flavor still disperses outward — both dispersing and astringing, which works better. This has its basis in Zhang Zhongjing’s Shang Hai Za Bing Lun: when treating a cold-induced cough that needs both outward dispersion and astringing, schisandra is paired with asarum (xi xin) and dried ginger — that combination appears in She Gan Ma Huang Tang and Xiao Qing Long Tang, with excellent results. So when you buy wu wei zi, be sure to ask the pharmacy to pound it for you. Same with niu bang zi — pounded, it works better; it resolves toxin and soothes the throat. Doctor Zhang Xichun’s pairing insight: 30 g of sheng huai shan yao with a little niu bang zi — the yam tonifies lung and spleen, the burdock seed clears away any remaining pathogenic qi; it’s specifically for the lingering cough left after an external contraction: tonify on one side, add a touch of detoxifying on the other; once the pathogen is resolved and the upright qi is sufficient, the cough heals.
Second visit: the heat eased, the sweats stopped — but the pulse was still fast, and Doctor Zhang Xichun had a flash of insight
The first formula was taken for three doses: the burning heat eased a little, the dawn sweating disappeared, and the cough lessened slightly — but the pulse was still a bit over seven beats per breath. Doctor Zhang Xichun felt something was off. What was this formula missing?
💬 Note from Doctor Luo: Notice — this is a case from his younger years, treated in his home village, so he still had to think it through. By his later years he wouldn’t have needed to think at all; experience had taken over. Doctor Zhang mulled it over and over, and then it hit him — why was the pulse racing? Not just yin deficiency, but qi deficiency. That sentence is enormously important. The ancients had actually discussed this long before: Zhang Jingyue said the rapid pulse (shu mai, a fast-beating pulse) appears after high fever in external contraction diseases — but in internal damage diseases, when does the pulse run fast? Most people assume yin deficiency. But Doctor Zhang discovered: these days, few rapid pulses come from yin deficiency — most come from qi deficiency. Especially in people with insufficient kidney essence, the pulse races, because the body is running itself ragged. Doctor Zhang used an analogy: if you’re weak and you’re forced to carry something very heavy, your arms start to tremble and shake — a racing pulse is like that trembling; your body is running on empty, your heart is running on empty. I see many men today exactly like this: rapid pulse from kidney-essence deficiency and qi deficiency. On the surface nothing looks wrong, but the kidney essence is already depleted.
So the treatment had to change: while heavily tonifying true yin, add a little qi-tonifying medicine.
Second formula: adding ye tai shen — four doses cured 70–80% of the illness
The second formula kept the foundation: sheng huai shan yao at 30 g unchanged, now plus ye tai shen, 9 g — wild codonopsis from Mount Wutai; the large sweet wolfberry, xuan shen, sheng di huang, licorice and cornus remained, and tian hua fen (trichosanthes root), 15 g (five qian) was added.
💬 Note from Doctor Luo: Tian hua fen is the root of the gourd-vine plant trichosanthes — despite the name “powder” (fen), it isn’t a powder at all but white slices; as the old saying goes, “it has the name of powder but not the substance of powder.” It moistens dryness, nourishes yin, and resolves toxin, and is generally used for thirst caused by insufficient fluids. Doctor Zhang Xichun had a special insight: he believed tian hua fen has relatively strong detoxifying power — when a sore forms on the outside, use a little tian hua fen at the early stage to resolve toxin; if the sore grows inward and a sinus tract forms inside, pair tian hua fen with sheng huang qi and sheng gan cao, and no matter how deep the winding sinus tract goes, this combination can draw the toxin out. Why? Because trichosanthes is a vine — and everything that grows as a vine has the nature of unblocking the network vessels (tong luo). Using tian hua fen for hard-to-treat lung disease has two layers of meaning: first, the lung collaterals are as densely woven as a spider’s web, and this herb unblocks them and resolves toxin; second, it generates fluids, moistens dryness, and moistens the lung — when there is dry phlegm in the lungs that won’t dissolve, tian hua fen moistens the lung and breaks the dry phlegm apart.
Wu wei zi stayed in the formula, pounded as before, and white peony stayed; she gan (belamcanda), 9 g, was added — it clears heat, resolves toxin, disperses nodules, and reduces inflammation, acting especially at the throat; excellent for swollen, painful throat, it also stops cough and transforms phlegm, and suits upper-burner heat conditions well. Finally came sheng ji nei jin (dried chicken gizzard lining — the yellow kind), 4.5 g (one and a half qian).
💬 Note from Doctor Luo: Raw chicken gizzard lining has two functions. First, it helps move and digest the medicinal action — now that ye tai shen was added to tonify qi, there was a worry the tonic might feel stuffy; ji nei jin opens it up and lets it circulate. Second, anyone suffering from consumption usually has stasis and stagnation inside the body — this is Doctor Zhang Xichun’s view: anyone who is deficient tends to have stagnation, and raw ji nei jin moves blood and resolves stasis.
This formula was taken for four doses; together with the three before, the burning heat, fever and cough were 70–80% resolved, and the pulse gradually slowed to six beats per breath.
💬 Note from Doctor Luo: There it is — the qi tonics did the work. The earlier formula without the qi tonic didn’t have this effect. That’s why Doctor Zhang Xichun later often added a little qi-tonifying medicine to formulas like this. It also reminds us: when the pulse races very fast, don’t only think yin deficiency — it may be qi deficiency.
Third formula: chuan bei mu and sheng yuan zhi to finish — five doses to full recovery
The illness wasn’t completely gone; a little remained. Doctor Zhang Xichun opened a third formula: sheng huai shan yao at 30 g — this was Doctor Zhang Xichun’s fixed, immovable herb; ye tai shen reduced to two qian, less wolfberry, xuan shen, sheng huai di huang and licorice unchanged; tian dong (asparagus root) replaced the mai dong; cornus and white peony as before. Two new herbs were added this time:
- Chuan bei mu (fritillaria bulb) — clears heat and transforms phlegm. You absolutely must not use this herb wrong: never use it when you’ve caught cold — with a cold-induced cough it makes things worse and drags on without healing, because it’s a cold, cooling herb; for hot cough and dry cough, chuan bei mu works outstandingly well;
- Sheng yuan zhi (polygala root) — Doctor Zhang Xichun said yuan zhi can regulate the opening and closing of the lungs, letting the lung gradually return to its normal rhythm. Yuan zhi tastes sour, and sourness makes the lung generate more fluids — once the fluids are sufficient, the dry phlegm and congealed phlegm that wouldn’t dissolve in the lungs can dissolve and be expelled. That’s why Doctor Zhang, treating lung disease, would often add a little yuan zhi plus raw ji nei jin.
This formula was taken for five doses, and the burning heat and cough were cured, with the pulse back to normal. One case of labor-weariness cough — in his younger days Doctor Zhang Xichun used about a dozen doses in total and cured it.
Aftercare: Chinese yam powder with fresh pear juice — tonify the lung and moisten dryness at once
The decoction was stopped, and Doctor Zhang Xichun prescribed a food-therapy aftercare formula — see if you can guess it; it’s very simple: sheng huai shan yao ground into powder — the yam powder we see today — cooked into a paste, with fresh pear juice stirred in: white pear pressed into juice, mixed into the yam paste, slightly sweet and very pleasant to drink.
💬 Note from Doctor Luo: Why this combination? Huai yam tonifies the lung, spleen and kidney — build up the spleen and lung, build up the upright qi; the pear nourishes yin and moistens dryness — tonify the lung on one side, moisten dryness and stop cough on the other, and the two work together perfectly. If a child meets this kind of situation, you can mix it the same way — it tastes great. After Doctor Zhang Xichun cured a patient with decoctions, finishing with food therapy was his standard practice.
Doctor Luo’s summary: a rapid pulse isn’t only yin deficiency — it can be qi deficiency
What should we take away from this case?
💬 Note from Doctor Luo: First, for cough caused by deficiency and consumption, don’t only think of yin deficiency — sometimes it’s qi deficiency. So when the pulse races very fast, don’t only assume yin deficiency. Second, while heavily tonifying kidney essence and nourishing yin, sometimes you also need to add a little qi tonification — only when your upright qi is sufficient can the lung function return to normal. Third, external pathogenic qi and upright deficiency usually coexist, in varying proportions — in this case the deficiency was huge and the external pathogen perhaps tiny, perhaps just a slight trigger. Disease never behaves the way textbooks present it — either external contraction or internal damage; no, the two are usually mixed. You can see Doctor Zhang’s second formula adding she gan and tian hua fen — a touch of pathogen-clearing intent; the first formula used niu bang zi for the same purpose. For this kind of long, lingering cough, Doctor Zhang basically seized the main contradiction of upright deficiency, made supporting the upright the priority, and added only a little pathogen-clearing medicine on the side. And one more point: wu wei zi must always be pounded before use — people have stopped paying attention to this, but only pounded does its power come out; and if you can pound niu bang zi too, it works even better.
Finally, a word straight from Doctor Luo’s heart: he has been teaching Doctor Zhang Xichun’s book case by case from the very first one. Some physicians pick and choose which cases to teach, but a physician like Doctor Zhang Xichun — he feels virtually every case is worth teaching. There is some repetition, but through repeated exposure, repeated practice, and noticing the small variations each time, you truly master why he prescribed the way he did.
💬 Note from Doctor Luo: Let me also announce something here: my audio programs will soon enable a like-and-tip feature — fifty cents or one yuan is fine. Why? Because knowledge has a price. I teach the Dao De Jing to spread civic literacy, so that is entirely free; but teaching Chinese medicine is different — for anyone to change their health and gain knowledge, there must be some investment. Other TCM teachers are all running paid courses; if I alone keep lecturing daily and charge nothing, that’s unfair to them. In Journey to the West, when the Tang Monk and his disciples reached the Great Thunder Monastery and met the Buddha, the Buddha was too polite to say it outright, but you had to offer something in exchange for the Dharma — the world is fair; you only gain by giving. In the end the Tang Monk gave the Buddha his alms bowl, and the Buddha said a token is enough, but the scriptures could never be carried off empty-handed. To learn, you must give something — only then do you value it and study it properly.
Compiled from Doctor Luo Dalun’s lectures on Doctor Zhang Xichun’s cases; source: Records of Chinese Medicine with Western Reference (《医学衷中参西录》), published serially 1918–1934.