How Should Gui Zhi Tang Really Be Used? — Clinical Applications of the First Formula of the Shang Han Lun, Explained by Doctor Luo Dalun

Patient search terms: afraid of wind and cold / sweating at the slightest move / always catching colds / sweating too much / sweating on one side of the body / urticaria with aversion to wind / how to use Gui Zhi Tang

Corresponding medical terms: disharmony of ying and wei qi · tai yang wind strike · cold damage with superficial deficiency · yin-yang disharmony · consumptive exhaustion · wind-induced urticaria

Opening: The formula is explained — now let’s talk about how to use it

Last time we took apart the meaning of Gui Zhi Tang (Cinnamon Twig Decoction) — why it is the first formula of the Shang Han Lun (Treatise on Cold Damage), the “crown of all formulas,” and how a few herbs can harmonize ying and wei qi, harmonize yin and yang. Now that the formula is clear, the most practical question arises: how do you actually use it?

💬 Note from Doctor Luo: Earlier we discussed this formula and introduced it to you. Today let’s talk about its application — I’ll use the real cases from the old masters, the senior TCM physicians, as demonstrations, so you can see what this is really about. Talking theory alone is not enough; you have to look at real, no-holds-barred case records.

Doctor Luo presented demonstration cases from seven senior masters — external-contraction illness, internal injury, half a year of fever, wearing cotton clothes in midsummer, sweating on only one side of the body, and urticaria. Let’s go through them one by one.

Demonstration One: Xu Shuwei — with an external-contraction illness, think of Gui Zhi Tang immediately

The first demonstration comes from Xu Shuwei’s Shanghai Jiushi Lun (Ninety Treatises on Cold Damage). It treats an external-contraction illness: fever from an external contraction.

💬 Note from Doctor Luo: In external-contraction illness, we speak of disharmony of ying and wei qi. What usually happens? Strong wei, weak ying — the defensive qi on the outside is unusually strong, and it forces the nutritive yin outward, causing sweating. This is one state of external-contraction illness. A person in this state is definitely deficient in upright qi, with weakness of the spleen and stomach qi — when the spleen and stomach are insufficient, the ying and wei qi cannot circulate in coordination; one is strong, the other weak — in any case they cannot coordinate. Then external pathogens invade easily, so the body is deficient, especially superficially deficient (biao xu).

Why is it called superficial deficiency? Because ying and wei qi both travel to the body surface to defend the body — ying is within the vessels, wei is outside the vessels, protecting you at the surface. When the surface is deficient, wind and cold invade as soon as they strike — hence the name superficial-deficiency pattern. What are its main manifestations?

💬 Note from Doctor Luo: The key indicators are aversion to wind and cold, and spontaneous sweating — the sweat slowly comes out, and the more you sweat, the more you fear the wind. There are also accompanying symptoms: some gastrointestinal discomfort, vomiting upward, nasal congestion, and sometimes fever. Once you know these signs, when you meet an external-contraction illness again, use Gui Zhi Tang right away and the effect is excellent — honestly, this is one of the formulas I use most often. The moment this pattern appears, use it and it resolves immediately, with immediate results.

And why did Zhang Zhongjing place Gui Zhi Tang as the very first formula in the Shang Han Lun? Because it appears in a very high proportion of cases — people with exceptionally strong upright qi rarely catch external-contraction illnesses; those who fall ill are usually deficient, mostly affected by cold pathogens. That’s why the Gui Zhi Tang pattern appears so frequently.

Case Two: Liu Duzhou — fever and sweating for over a year, treated as yin deficiency for more than twenty doses without effect

It’s easy to understand using Gui Zhi Tang for external-contraction illness — but what about internal injury? The second case Doctor Luo tells is from the late master Liu Duzhou.

💬 Note from Doctor Luo: Doctor Liu Duzhou was a great master of the cold-damage school at Beijing University of Chinese Medicine — a founding elder. He and Doctor Zhao Shaoqin were counterparts: one specialized in cold damage, the other in warm disease. Doctor Liu Duzhou has many such case records.

This patient, Ms. Li, female, 53, suffered from what? Paroxysmal fever with sweating for more than a year — waves of fever and sweating, two or three episodes a day. Previously she had been treated as yin-deficient fever; more than twenty doses produced no effect at all.

💬 Note from Doctor Luo: Asked about her appetite and digestion, she said her bowel movements and urination were roughly normal, nothing wrong. Look at the tongue — pale tongue with white coating — this is very important! In Gui Zhi Tang patients, the tongue body tends to be pale, with a white coating; the tongue body is pale and often has teeth marks. Remember: this tongue is absolutely not bright red, and not without coating. This is one of my diagnostic bases: the tongue body must be pale with teeth marks on the edges, and the coating thin and white, not yellow. Then take the pulse — slow, soft and weak, beating slowly and without strength.

Doctor Liu Duzhou said this is a pattern of ying-wei disharmony where wei fails to guard ying. What does that mean?

💬 Note from Doctor Luo: When wei qi is weak, it cannot control ying yin — wei qi defends on the outside, while ying qi carries the material, nutritive substances inside. When wei qi is insufficient, it cannot restrain the ying yin inside, and the ying yin slowly leaks out, causing sweating. So this is called wei failing to guard ying, another form of ying-wei disharmony. In short, whenever ying and wei are disharmonious — let me give you a metaphor: it’s like riding a bicycle. If you can’t ride well, the two wheels wander — first the front goes left and the rear goes right, then they veer back again. The two wheels can’t coordinate and won’t stay on the road; the bike sways back and forth. That’s the model of ying-wei disharmony.

So what to do? Harmonize ying and wei. Grasp the key points: pale tongue, white coating, soft weak pulse, sweating, fever — treat it with the method of “sweating to stop sweating.” The sweating is not the goal; harmonizing ying and wei is — using the sweating method to stop the abnormal sweating.

💬 Note from Doctor Luo: The formula Doctor Liu Duzhou prescribed: guizhi (cinnamon twig) 9 g, baishao (white peony) 9 g, shengjiang (fresh ginger) 9 g, zhi gancao (honey-fried licorice) 6 g, and 12 red dates. After taking the medicine, drink a bowl of hot thin rice porridge, then wrap up a little extra clothing and don’t let the wind touch you — sweat slightly, and this person’s illness is cured — truly remarkable. This is an internal-injury illness; whether or not it’s menopause-related, once you seize the sweating and the pale tongue color, this is definitely spleen-stomach qi deficiency.

Doctor Luo’s private tip: after Gui Zhi Tang, drink a bowl of Chinese yam powder

At this point Doctor Luo shared one of his own usage insights:

💬 Note from Doctor Luo: With methods like this, I now have patients drink some yam powder — after taking Gui Zhi Tang, porridge works too, but if you have the means, a bowl of huai shan yao (Chinese yam) powder gives immediate results, honestly. For the typical fresh superficial-deficiency type of cold — the Gui Zhi Tang pattern — one dose solves it, and one more dose consolidates the recovery. That’s it.

Case Three: Yue Meizhong — a girl who ran a fever for half a year at 40 degrees, cured in three doses

The third case comes from the late master Yue Meizhong — a famous senior TCM physician in Beijing.

The patient, Ms. Zhang, female, 15, had fever for more than half a year, reaching 40°C, unresponsive to many treatments.

💬 Note from Doctor Luo: The illnesses these old TCM masters treated were usually extremely difficult cases — by the time a patient reached them, they were basically incurable by others. What were her symptoms? Thirsty but unable to drink much — thirsty, but unable to take in much liquid; normal bowel movements and urination; pale tongue with yellow coating — the tongue body was pale, and here the pale tongue body is the main thing! The yellow coating was because she was in continuous high fever; high fever turns the coating yellow. But that is not the root; the root is the pale tongue. The yellow coating is a surface phenomenon, a result. There was also fever with aversion to wind, a floating, moderate pulse, and occasional sweating — did you notice? In most Gui Zhi Tang case records, “occasional sweating” appears.

💬 Note from Doctor Luo: You must grasp this crux — wind-strike pattern, ying-wei disharmony. What does that mean? She had once been affected by wind pathogen, it hadn’t cleared properly, and it resulted in ying-wei disharmony. And what does ying-wei disharmony produce? Fever, aversion to wind and cold, spontaneous sweating. Seize these signs, then look at the tongue — it’s pale. And the yellow coating? High fever evaporates fluids; after the fluids are evaporated, the tongue coating gradually turns yellow. So this is a result, not the root cause. The diagnosis is ying-wei disharmony — what to do? Use Gui Zhi Tang.

Doctor Yue Meizhong prescribed Gui Zhi Tang for her — Doctor Luo notes that chi shao (red peony) can also be used in Gui Zhi Tang; the original formula allows either chi shao or bai shao, and bai shao works just as well. And the result?

💬 Note from Doctor Luo: Three doses, taken according to the proper method — drink it the Gui Zhi Tang way, follow with some hot porridge — and the illness was cured. Do you see? As long as a classic formula matches the pattern, this kind of functional illness resolves very quickly. When Zhang Zhongjing’s formula is correctly matched, we say “classic formulas never need more than three doses” — generally three doses must show effect, and some are cured in three. This is the remarkable part of TCM when the pathology is analyzed correctly.

Case Four: Zhu Chenyu — the man who came to the clinic wearing cotton clothes in midsummer

The fourth case is even more interesting — from the late master Zhu Chenyu.

💬 Note from Doctor Luo: Who was Zhu Chenyu? He was Shi Jinmo’s son-in-law — Shi Jinmo was one of the Four Great Physicians of Republican-era Beijing. Doctor Zhu later established the first specialized TCM diabetes clinic at Peking Union Medical College Hospital. Doctor Zhu was formidable — all these are senior masters of TCM.

The patient, Mr. Luo, male, 50, came for a home visit on a day in August 1971 — in the summer of ’71, already high summer, yet he came dressed in cotton padded clothes and trousers.

💬 Note from Doctor Luo: We do encounter patients like this — in the heat of summer, when everyone else is fine, he’s wearing cotton clothes and trousers; you can even meet them on the street. He said he had extreme aversion to wind — particularly afraid of wind and cold; a gust of wind and he couldn’t bear it; constant spontaneous sweating — he sweated on his own, for no reason. But the more he sweated, the more he feared the wind; the more he feared the wind, the more clothes he piled on. If he took off the cotton clothes, he immediately felt the wind piercing to the bone — as if his bones were blown through — and his sweat was cold sweat. So even in high summer he dared not remove the cotton clothes; he suffered greatly. What were his usual symptoms? Poor appetite — he ate little, had stomach problems, a sign of spleen-stomach weakness; fatigue and listlessness — constantly tired and lacking strength.

Doctor Zhu Chenyu diagnosed deficient upright qi with ying-wei disharmony — based on what? Based on his spontaneous sweating.

💬 Note from Doctor Luo: Deduce from TCM diagnosis: was this man’s complexion pale or rosy? Absolutely pale. What about the tongue? Everyone can imagine it — the tongue was not bright red; it certainly had teeth marks, the tongue body was pale and white, with a lot of saliva on top and a white coating — that cold-damp state, definitely not a sign of flourishing yang. The more you study TCM, the more you realize that TCM grasps a state of the human body — I adjust your state back. The ancients were extremely clever: they took the plants that exist between heaven and earth and used them to adjust the state of your body — just a few simple herbs, just Gui Zhi Tang.

Doctor Zhu prescribed five doses of Gui Zhi Tang — just guizhi, baishao and zhi gancao plus fresh ginger and dates, that’s all — five doses.

💬 Note from Doctor Luo: Five days later he returned, saying he was no longer afraid of the wind, could ride a bicycle, had shed the cotton clothes for lighter ones, and his sweating had decreased. Doctor Zhu said, take three more doses — and after those, he was completely cured. This is a very typical, very classic internal-injury case. His illness may have started from external contractions — years of deficient upright qi and weak spleen qi, repeated colds, the more he sweated the more he feared wind, the more he feared wind the more he dressed, the more he dressed the more he sweated — until finally his exterior qi was no longer secure, his entire surface defense system was collapsing, so the wind pierced straight to his bones. Doctor Zhu solved the problem in eight doses — a long-standing illness cured like that.

Case Five: Liu Duzhou — left half of the body sweating, right half dry, with a clear boundary

The fifth case is again from Doctor Liu Duzhou — and it’s very strange.

The patient, Mr. Sun, male, 39, had this condition: the left half of his body constantly sweated, while the right half had no sweat at all, with a clear boundary — and no other discomfort anywhere. His pulse was moderate and slightly floating, tongue coating thin and white.

💬 Note from Doctor Luo: Isn’t that amazing? Just this one symptom, nothing else — left half sweating, right half dry. Doctor Liu Duzhou judged it as disharmony of yin and yang, qi and blood, between left and right — our body’s qi and blood circulate, and “left and right are the pathways of yin and yang.” Left and right are the roads of yin and yang. When yin and yang fail to coordinate, problems of left-right asymmetry appear. Here there was sweating — but only on half the body; still, it was sweating, so the treatment should harmonize yin and yang, making qi and blood even and moist.

💬 Note from Doctor Luo: Doctor Liu Duzhou believed that besides harmonizing ying and wei, Gui Zhi Tang can also harmonize the body’s yin and yang — when yin and yang are uncoordinated or biased, Gui Zhi Tang can help adjust them. Why? Guizhi and shengjiang generate yang; baishao gathers yin; dates nourish blood; zhi gancao harmonizes the spleen and stomach — it’s a formula for adjusting yin and yang. Doctor Liu Duzhou prescribed Gui Zhi Tang; after taking it he drank a bowl of hot porridge, achieved a light sweat, and was cured — a little sweat and the illness was gone. So remember: Gui Zhi Tang is a yin-yang harmonizing formula. When your yin and yang are out of coordination, you can use Gui Zhi Tang to adjust them.

At this point Doctor Luo inserted a memory from his student days:

💬 Note from Doctor Luo: All the cases I’m telling you now, I studied carefully when I was a student — I took colored pens and marked out which symptoms appeared and how they were judged. By the end the book fell apart, page by page flying loose. Zhang Zhongjing didn’t discuss tongue diagnosis much in the Shang Han Lun, so I seriously collected these case records and pondered what tongue appearance each formula pattern actually has — by matching tongue appearance to the formula pattern, application becomes more accurate. The Gui Zhi Tang tongue is this: the tongue body is definitely pale, pale-white, never bright red, often with teeth marks on the edges, and the tongue is swollen and large — the classic qi-deficient, yang-deficient tongue; the coating is thin, or slightly thicker, with lots of fluid on top.

Case Six: Liu Duzhou — the eighteen-year-old who married early and collapsed into severe exhaustion

The sixth case is Doctor Liu Duzhou’s treatment of severe consumptive exhaustion — full of twists, and the most interesting of all.

The patient, Mr. Liu, male, 18 — this is from the years before the Cultural Revolution — married at 18. The young man had always been deficient in qi and blood, and six months after marriage he began: sore weak lower back and legs, dizziness and tinnitus, frequent and scanty urination, aversion to cold, numb-cold sensation in both legs — even in the dog days of midsummer he wore cotton clothes and still felt cold in his limbs; sweating at the slightest movement — a little motion and the sweat poured out. He ate poorly, had abdominal distension, a sweet-sticky taste in the mouth, many dreams at night, seminal emission, and reckless minister fire — his constitution declined day by day.

💬 Note from Doctor Luo: Previously others treated him with ginseng, deer antler and such great tonics — no effect. When Doctor Liu Duzhou saw him: thin and timid in build, withered complexion, failing spirit — his body was thin, his face sallow, not rosy, his spirit weary; voice low and faint, speaking very quietly. Both pulses were deep, fine and weak; the tongue — red-tender body with scant coating. That “red-tender” was actually pale-red, the especially tender kind of pale red. Combining pulse and symptoms, he concluded: excessive sexual activity, consuming qi and injuring fluids, disharmony of the organs, deficiency of yin and yang.

So what to do? Logically one should tonify the kidneys and cultivate the root — but previous doctors had used ginseng and deer antler without effect. Why didn’t deer antler work?

💬 Note from Doctor Luo: Then let’s harmonize yin and yang instead. So he started from Gui Zhi Tang to regulate yin and yang. In treating this state there are many approaches — there are herbs that directly tonify the kidneys, and all sorts of methods. But if you seize his sweating, spleen deficiency and qi deficiency, and you regulate yin and yang — what does Gui Zhi Tang do? It activates spleen-stomach function and increases qi-blood circulation, so that ying and wei circulate smoothly and the channels run freely. The core is activating spleen-stomach function, which increases the body’s upright qi, and then yin and yang can coordinate.

Doctor Liu Duzhou prescribed: guizhi 15 g, baishao 15 g, zhi gancao 6 g, shengjiang 6 g, 10 red dates — five doses.

💬 Note from Doctor Luo: After five doses, all symptoms greatly reduced. But this was a deficiency-damage illness; it cannot be cured overnight. So on the base formula he added huai shan yao 15 g, chao baizhu (dry-fried atractylodes) 12 g, and jineijin (chicken gizzard lining) 10 g — for what? To tonify the spleen and stomach — do you see? Still regulating the spleen and stomach. He also added Gui Fu Ba Wei Wan (Kidney-Qi Pill with cinnamon and aconite) to tonify the kidneys. Half a month later, he reported abundant energy, double appetite, and all illnesses gone — every symptom had disappeared.

💬 Note from Doctor Luo: For weakness caused by sexual indulgence — essentially kidney deficiency, with the whole upright qi depleted — there are many ways to treat it, including direct kidney tonics. But when the overall deficiency of upright qi is serious, especially when ying-wei disharmony and dual deficiency of yin and yang are prominent, you start from the spleen and stomach — Gui Zhi Tang’s focus is always the spleen and stomach. Then, combined with the kidney-tonifying Gui Fu Di Huang Wan, it was cured. There’s a similar approach in Zhang Zhongjing’s Jingui Yaolue (Essentials from the Golden Cabinet): Gui Zhi Jia Longgu Muli Tang (Cinnamon Twig Decoction plus Dragon Bone and Oyster Shell) treats “those who lose their essence” — men who lose their essence through indulgence and suffer great depletion of essence qi, women with dream intercourse. Zhang Zhongjing also started from Gui Zhi Tang, adding long gu (dragon bone) and mu li (oyster shell). Today, many people whose bodies are depleted by indulgence find that sometimes kidney tonics work and sometimes they can’t be absorbed — ultimately, by regulating the spleen and stomach through the Gui Zhi Tang approach, it can gradually be adjusted back. That’s one way of thinking.

Case Seven: Liu Duzhou — urticaria with maddening itch, cured by Gui Zhi Tang with a light sweat

The seventh case is again from Doctor Liu Duzhou — treating urticaria (wind-induced rash).

The patient, male, 60, suffered from urticaria with itching that bored into his heart, uncured for months. His pulse was floating and moderate; his symptoms were sweating with aversion to wind — he often sweated for no reason, sweated with any movement, while others didn’t sweat nearly as much; thin, white, moist tongue coating, tongue body pale red, even pale white.

💬 Note from Doctor Luo: Doctor Liu Duzhou judged: wind pathogen lingering in the skin and flesh, ying-wei disharmony. What’s the cause? Deficient upright qi, insufficient spleen-stomach qi, unable to drive ying and wei circulation; ying and wei don’t coordinate well, so wind rash breaks out — there’s an external pathogen on the body surface, and the ying-wei qi can’t drive it out; it gets “stuck” there, and wind rash develops. What to do? Dispel wind and harmonize ying and wei — the formula prescribed was Gui Zhi Tang: guizhi 9 g, baishao 9 g, shengjiang 9 g, 12 red dates, zhi gancao 6 g. After taking it, drink some hot porridge, cover up a bit, wrap in clothing, sweat slightly, and the rash disappears and the itching stops — immediate results; the illness was cured.

Doctor Luo says he has special experience treating urticaria:

💬 Note from Doctor Luo: I’ve said before that in treating urticaria — the kind where the bumps appear the moment wind blows, especially cold wind — Gui Zhi Tang gives immediate results. I would say Gui Zhi Tang is the nemesis of this illness. Remember what such a person’s tongue looks like? Pale-white tongue body with teeth marks, the tongue often swollen and large, lots of saliva on top, thin white coating; all sorts of qi-deficiency signs, especially frequent sweating, a pale face, and constant fear of wind and cold. As long as the pattern matches, use it and it works immediately — excellent results.

Closing: the Gui Zhi Tang pattern in one character — “deficiency” (xu)

With the seven cases told, Doctor Luo summarized how Gui Zhi Tang should really be used:

💬 Note from Doctor Luo: That concludes the Gui Zhi Tang case discussion. Actually, whether external-contraction or internal-injury illness, whenever you meet the Gui Zhi Tang pattern — you judge that deficient upright qi and weak spleen and stomach have led to ying-wei disharmony or yin-yang disharmony — and all the patient’s symptoms match this picture, you can use Gui Zhi Tang. This formula regulates very well and applies extremely widely; many illnesses, even some emotional disorders, respond to it. Why? Guizhi enters the liver and assists liver yang; baishao gathers liver yin; its action harmonizes liver and spleen — when liver qi is smooth, the spleen’s burden lightens, so the spleen-tonifying effect is excellent. The hallmark of these classic formulas: whatever illness you have, as long as the pattern matches, you will see results.

But — Doctor Luo adds a special warning, and it’s the most important sentence:

💬 Note from Doctor Luo: We’re explaining this not so you’ll start writing prescriptions — don’t use it carelessly. The pattern must match — if your tongue is red and you also sweat, that’s damp-heat — damp-heat people: big and stout, red face, red tongue, yellow greasy coating, sweating at the slightest move — that’s damp-heat, don’t use Gui Zhi Tang. Gui Zhi Tang requires: pale complexion, qi deficiency, weak pulse — only those manifestations. Everyone, don’t misuse it.

So what is the real value of learning Gui Zhi Tang?

💬 Note from Doctor Luo: Studying the Shang Han Lun has this benefit: the ancients already systematized the imbalances of the human body — which symptoms you have, why these symptoms appear, what the mechanism is — they explained it all, and established formulas with remarkable precision, using the plants available between heaven and earth to adjust the state of your body. Friends, this is great wisdom. Ordinary people gain real benefit from learning some of this — you will always meet people who are simply deficient: tired every day, afraid of wind and cold, breaking into sweat at the slightest movement, catching cold the moment wind blows — everyone else is fine but they catch cold. After learning this you understand: deficiency, insufficient upright qi. Where does upright qi come from? From the spleen and stomach — the spleen and stomach absorb nutrients and transform them into ying and wei qi; ying circulates inside the vessels, wei circulates outside, defending our body. When ying and wei are disharmonious and deficient, the two fail to coordinate, and the defense system develops all sorts of problems. The ancients also told you that this little formula can adjust it back. Those who don’t understand go get IV drips when their body fails — the more drips, the colder they get, colder and colder — can IV drips really help? So this is something everyone must learn; it truly is wisdom handed down by the ancients.

Finally, Doctor Luo announced: tomorrow the lecture on the Shanghai Jiushi Lun continues. Dear friends, see you tomorrow.

Based on Doctor Luo Dalun’s lecture series on Xu Shuwei’s case records.