Fever That Kept Coming Back No Matter What — Until Eight Liang of Gypsum (and a Pear) Broke It

Opening: a fever that came back no matter what — even Doctor Zhang Xichun seemed to miss

There is nothing more maddening about a fever than the pattern of breaking and returning — the medicine brings the heat down, and the next day it flares right back up, driving the whole family to despair. The patient in today’s case pushed that despair to the limit: Doctor Zhang Xichun wrote him a prescription, raised the raw gypsum step by step from four liang all the way to eight liang — and the fever still would not break. The family was terrified. So how did the fever finally go away? The answer is almost unbelievable — a slice of pear.

💬 Note from Doctor Luo: This is one of Doctor Zhang Xichun’s most characteristic cases. Many people who catch colds today are, in fact, people who were already “carrying a fire” inside — get stressed and you catch cold, get a fever and you catch cold, run into something annoying at work and within two days you’re sick, with uncanny precision. The reason behind all that becomes clear once you finish this case.

Who was the patient? First, a story about “losing money in the stock market”

The patient was Ma Puchen, from Daxiguan, Liaoning — “Liaoning” here means Fengtian, today’s Shenyang, Doctor Luo Dalun’s own hometown. In those days Daxiguan was a bustling district. Ma Puchen was fifty-one years old, past middle age, and his occupation was business. Whenever Doctor Zhang Xichun notes “businessman” at the start of a case, everyone already knows the profile: constant worry, constant stress, and a body prone to heat.

His family had been comfortably well-off. But then came the ruinous move — he began speculating in Russian silver ruble notes. This was very much like playing the stock market today, and through all the buying and selling, he lost tens of thousands of dollars, and the family sank into poverty almost overnight.

💬 Note from Doctor Luo: Does this sound familiar? How many people do we know today who have dragged a comfortably-off family down toward the poverty line through stock trading or futures speculation? Ma Puchen was consumed with regret, thinking day and night: why did I ever buy those notes — now I’m stuck with nothing! That blaze of regret is precisely heart-liver fire — internal heat generated inside the body. From the Republic era to today, the professions, the mindsets, and the illnesses are all the same.

How the illness built up: first swelling, then a blazing fever

That year, in early winter (meng dong), Ma Puchen caught wind: cough with phlegm, slight wheezing, scanty urine, and swelling all over the body. This was brought on by an external contraction. The lung governs the qi of the whole body; when the lung is affected, qi cannot circulate, fluids cannot flow, urination goes wrong, and the whole body swells. That time Doctor Zhang Xichun cured him.

But about ten days later, he caught wind-cold again, and this time he came down with a blazing high fever — great heat throughout the exterior and interior, restlessness and irritability, and a distending pain in the head.

Why the irritability? Because the heat inside had become too fierce. He had always carried heart-liver fire (from the stock-market losses); now external cold came in, the body generated heat to fight the pathogen, and the two fires combined — the fire became enormous.

💬 Note from Doctor Luo: Here’s an analogy: suppose your house is full of gas canisters, each with a small flame burning on top. A bug flies in, and you want to burn it — but as soon as you do, every single gas canister in the house ignites at once, and the whole place goes up in a roar. Ma Puchen’s high fever was exactly like that — the fire was already stored inside, and the moment the external pathogen arrived, all of it was lit.

How sick was he? The tongue and pulse were telling the whole story

Look at the details — every single one was diagnostic:

First, the distending pain in the head. The heart and liver carried heat, and that heat joined the yang ming heat rushing upward — with so much internal heat, fluids run short and qi movement becomes disordered; that is the classic yang ming fu shi (excess-heat repletion of the stomach-intestine system). The heat of the liver and gallbladder plus the qi-level heat of the yang ming surged upward — and the head ached.

Second, a bowel movement only once every several days, extremely dry. When the external pathogen arrives, the body mobilizes its energy to resist; heat is over-produced and internal fluids run low. Doctor Luo’s analogy: it’s like a riverbed gone dry — the boat cannot move. The stool gets stuck inside, qi circulation gets even more blocked, the body gets hotter — a vicious cycle.

Third, a thick white tongue coating with a slightly yellow center. White coating is still fairly normal; the yellow in the middle shows the heat has begun to transform. If the coating turns yellow and dry, the heat is fiercer still; scorched black, and it is beyond serious.

Fourth — and most important — an extremely surging, replete pulse on both wrists. Doctor Zhang Xichun said the yang ming fu shi pulse usually shows only on the right hand — the right corresponds to lung, spleen and ming men, so a blocked stomach-spleen should show on the right. But this patient’s pulse was surging and replete on both hands. Why? Because the left hand corresponds to heart, liver and kidney — he did not only have yang ming qi-level heat; the liver-gallbladder fire was also extremely fierce, which is why both pulses pounded so hard.

💬 Note from Doctor Luo: Everyone needs to realize that a great many external-contraction diseases are a combination of internal cause and external cause. Don’t just assume a cold is caused by cold weather — people with qi deficiency or yang deficiency are easily injured by cold evil, people with yin deficiency or blood deficiency are easily injured by heat evil, and people with constrained liver qi and blazing liver fire are also especially prone to catching external pathogens. In modern society, people with constrained liver qi are everywhere: once the liver qi is stuck, qi and blood become disordered, the upright qi cannot circulate, the qi mechanism knots up, and only then can the external pathogen get in. This case is called “typhoid fever with latent heat” — the latent heat was his own liver fire, burning quietly inside all along.

The prescription dissected: White Tiger Decoction as the base, plus one herb to clear liver fire

How to treat it? Clear the heat, bring the temperature down — with the White Tiger Decoction (Baihu Tang), plus one added herb to clear the liver-gallbladder heat.

The formula was clean:

• Raw gypsum, four liang (about 120 g), pounded into a fine powder (like fine granules of MSG — the finer the powder, the better the decoction works)
• Zhi mu (anemarrhena), one liang (about 30 g)
• Gan cao (licorice), four qian (about 12 g)
• Jing mi (rice), six qian (about 18 g)
• Qing lian qiao (green forsythia), three qian (about 9 g) — added deliberately by Doctor Zhang Xichun: green in color, it enters the liver, clears the liver-gallbladder heat, and draws the power of the White Tiger Decoction into the heart and liver to clear heart-liver heat

One detail of preparation: many people today say raw gypsum must be decocted first, but neither Zhang Zhongjing nor Doctor Zhang Xichun ever wrote that — raw gypsum actually works less well when boiled too long; it should go into the pot together with the other herbs.

💬 Note from Doctor Luo: A word on qing lian qiao (green forsythia). Forsythia comes in two grades: the young fruit picked before the White Dew is green forsythia, with strong heat-clearing, detoxifying power; the older fruit picked before Cold Dew is lao qiao / huang qiao (old or yellow forsythia), with stronger power to disperse wind-heat and vent the pathogen outward — but its detoxifying strength is gentler, because the older herb has mellowed. Today growers almost always pick it green, rarely leaving it to mature. One more note: Han-dynasty weights unearthed by archaeologists show that one liang in Zhang Zhongjing’s day was about 15 grams in modern terms — zhi mu alone was used at six liang, nearly 90 grams; later doctors recalculated at “one liang equals three qian,” shrinking the entire classical formula drastically. That is one of the reasons classical formulas are not used well today.

The treatment struggles: four liang didn’t work, eight liang didn’t work, and the family panicked

Doctor Zhang Xichun was, by all accounts, the greatest master of raw gypsum — yet when the formula was taken in three divided doses, the heat eased only slightly, and the next day the disease returned to its original state — burning up again.

Doctor Zhang did not panic; he simply increased the dose. Five more doses, and the raw gypsum climbed from four liang to eight liang (over 200 grams) — and the disease remained exactly as before. Even more telling: the bowels did not even loosen. By any ordinary logic, that much cold medicine should have produced diarrhea — but this man showed not the slightest change, and the next day the fever was back.

The family was terrified — was the man beyond saving?

Doctor Zhang Xichun, however, was confident. He said the crucial words: “Gypsum is originally a peaceful herb — do not be afraid. It is only when you take its fine powder that it gains real power.” Grind the raw gypsum into an extremely fine powder and swallow it, he said — that is where the strength lies. He told the family not to interfere, to follow his instructions, and this time it would work.

💬 Note from Doctor Luo: Mark those words — “gypsum is originally a peaceful herb.” Later generations called gypsum a tiger among medicines, far too cold; Doctor Zhang Xichun said: those who call gypsum a tiger may use it boldly, without doubt. But there is a precondition — the heat must be genuine excess heat (shi re). As long as it is genuine excess heat that has not been cleared, you may use it boldly.

The killer move: pear slices dipped in gypsum powder — 1.5 liang, and the fever was gone

The formula still carried eight liang of raw gypsum as a decoction. In addition: take two liang (about 60 g) of raw gypsum, ground to an extremely fine powder, cut pear slices, dip them in the powder, and chew and swallow as you go.

Why dip pear slices? You might imagine simply stirring the powder into water — but gypsum powder sinks straight to the bottom; it won’t suspend. Doctor Zhang’s method was elegant: a pear is not cold, it is juicy, and a pear slice dipped in the powder lets you chew it down gradually, the powder going directly into the stomach.

And the result? When he had eaten about one and a half liang (roughly 45 g), the heat vanished completely — the fever broke! He stopped right there, and from that day the illness was cured, with no relapse. The case was followed up afterward, and indeed the fever never returned — the internal heat had been thoroughly cleared, and the man recovered his health.

💬 Note from Doctor Luo: This case was collected by the celebrated late-Qing / early-Republican physician He Lianchen, who included it in the famous National Collection of Famous Physicians’ Case Records (《全国名医验案类编》). In the book, He Lianchen quoted the Japanese master Wada Tokkaku: “Gypsum in small doses never works.” The White Tiger Decoction, the Bamboo Leaf and Gypsum Decoction, and all the other gypsum formulas use doses far larger than ordinary prescriptions. Doctors today don’t understand this; they use tiny amounts — like trying to put out a cartload of burning firewood with one cup of water — and of course nothing works.

A bonus piece of knowledge: why gypsum breaks fevers remains a mystery to this day

After telling the case, Doctor Luo recalled a true story: when he was lecturing on raw gypsum at Beijing TV’s Yang Sheng Tang (Health Hall) program, an old professor from Tsinghua University wrote to him. The professor said: you say one liang doesn’t work and eight liang does — but as researchers we know that the main ingredient of raw gypsum is calcium sulfate dihydrate, which is like a stone; the amount that dissolves when you boil it in water is vanishingly small. There is no significant difference between boiling one liang and boiling eight liang. Why does traditional Chinese medicine insist that adding more makes it work?

To this day, there is no answer. But the experimental data are solid: many studies of the White Tiger Decoction’s fever-reducing effect have been done — gypsum alone, the White Tiger Decoction with the gypsum removed, plain calcium-ion preparations — in every experiment, none worked as well as the full White Tiger Decoction containing gypsum. Moreover, the calcium sulfate has to carry the “dihydrate”; without it, the effect is worse. Yet the amount of calcium sulfate that dissolves is so tiny — could it really have such a powerful antipyretic action? The mechanism still cannot be explained.

💬 Note from Doctor Luo: Science is impressive, but the experience of our ancestors is even more so. Zhang Zhongjing already matched these medicines together beautifully two thousand years ago; we still can’t fully explain why the combination works so well even with modern experiments. In every plague epidemic, the White Tiger Decoction has been used with great frequency — the Qing-dynasty plague specialists Yu Shiyu and Wang Mengying both saved lives with massive doses of raw gypsum. It truly can save lives. The secrets of the classical formulas accumulated by the Chinese ancients are well worth our continued study.

Closing: Doctor Zhang Xichun’s three most treasured herbs

Doctor Zhang Xichun’s greatest contribution to Chinese medicine over his lifetime was exploring and expanding the scope of a few key medicines. The three he valued most were raw gypsum, san qi (notoginseng), and Huai shan yao (Chinese yam). In the late Qing, the Jiangnan region favored a “light and agile” style of prescribing — the lighter the dose, the higher the presumed skill; the more processed the herb, the more refined the art. That was the fashion for prescribing to the wealthy — the more elaborate, the more silver could be charged. That is why, reading late-Qing case records, you will see calcined gypsum (duan shi gao) being used. This was actually a bad habit: calcined gypsum is fine for external application, but taken internally it is a poison. For oral use to clear heat you must use raw gypsum, and in large doses.

Doctor Zhang Xichun also had a signature trick with raw gypsum — dipping pear slices into the fine powder and chewing it. Whenever heat-toxin was present, he loved to clear the heat with raw gypsum and let the body recover on its own. The trace amount of calcium compounds that dissolve does no harm to the body, and yet it puts out the fever — the principle is something we should keep researching.

💬 Note from Doctor Luo: Remember today’s two lessons: first, raw gypsum may be used boldly — but only for genuine excess heat; second, besides the decoction, chewing pear slices dipped in raw gypsum powder is extraordinarily powerful. That was Doctor Zhang Xichun’s signature fever-breaking move.

Case based on Doctor Luo Dalun’s (PhD, Beijing University of Chinese Medicine) public lectures on Doctor Zhang Xichun’s cases; the case itself is from Records of Chinese Medicine with Western Reference (《医学衷中参西录》).