Fever, Restlessness and a Shrinking Tongue After One Night of Indulgence — a 79-Year-Old Man at Death’s Door? How Doctor Xue Lizhai Guided the Fire Back with Shiquan Dabu Tang and Bawei Wan
People search for: fever / burning all over / restless and can’t sleep / dry mouth and tongue / dry tongue / frequent urination / headache / insomnia
The medical terms behind it: kidney-essence deficiency · floating deficiency fire · true cold with false heat · dragon-thunder fire rising
Opening: one night of indulgence nearly cost a 79-year-old man his life
In this story, Doctor Xue Lizhai did not mince words in his case record. A 79-year-old man, with spring approaching, felt a stirring of desire and spent a night with his concubine. What happened? Headache with fever, body burning hot, wheezing badly, restless and unable to sleep all night — and his tongue shrank back, covered in thorns, like the shell of a lychee. The old man was hovering at the very edge of death.
💬 Note from Doctor Luo: Let me warn everyone first — this is an adult topic. It teaches us that when a person reaches advanced age, the kidney essence has almost nothing left to spare. It cannot withstand any further consumption — one small indulgence can be fatal.
Who was the patient: a seventy-nine-year-old father
The case happened in Tong’an Bridge (通安桥), and the patient was the father of Gu Dayou (顾大有). The ancients said “rarely does anyone live to seventy” — this father was already 79, a truly advanced age.
How did the illness arise? Xue Lizhai wrote eight characters at the start: “重冬将出，小妾入房” — as the deep winter was about to pass, he took his concubine to bed. Winter was ending and spring approaching; the south had already turned warm — the yang qi of heaven and earth was beginning to stir, and with it, people’s desires. An old man of advanced years should have kept his heart clear and his desires few, but at that moment he lost his restraint and slept with his concubine.
💬 Note from Doctor Luo: Don’t underestimate those eight characters. Xue Lizhai recorded the time and the trigger with total clarity: the season of late winter and early spring, when yang qi first stirs, plus the fuse of indulgence at an advanced age. Once the time and setting are laid out, the cause of the illness floats to the surface. Those eight characters are the key to the whole case.
Illness comes down like a mountain: heat, wheezing, phlegm, frequent urination and a shrinking tongue
One night later, the old man’s body collapsed on all fronts: headache with fever — his head ached and his whole body burned; dizziness with urgent wheezing — he was dizzy, breathing fast and hard; profuse phlegm — phlegm poured out of him; frequent urination — he ran to the toilet constantly; dry mouth — a desperate thirst; thorns grew on his tongue and it shrank back, looking like a lychee shell; the lower lip turned black and cracked; face and eyes were bright red; he was restless and sleepless; and at times a fire seemed to rush up his throat like smoke, so fierce that only cold tea could press it down.
Xue Lizhai’s own words: “濒于死” — on the verge of death.
💬 Note from Doctor Luo: Look at this long string of symptoms — heat, redness, restlessness — at first glance it is all a picture of “heat syndrome.” If you treat it as heat and use cold, cooling herbs to clear it, this 79-year-old man would have died on the spot — his primal qi would scatter in an instant. So the crucial step in this case is to recognize what this “heat” really is.
Doctor Xue Lizhai takes the pulse: huge and disorderly, body scorching hot — but this is an illusion
Xue Lizhai took the pulse: 脉洪大而无伦 — huge and without order. The pulse beat extremely large and forceful, as if right and wrong were locked in a death struggle; “without order” means it had lost all rhythm — an extremely dangerous sign. He touched the body: 烙手 — it burned the hand, scorching hot.
Could this really be a heat syndrome? Xue Lizhai cut through it in one sentence: “肾经虚火游行其外” — the deficiency fire of the kidney channel is roaming on the outside. What looks like heat is actually deficiency; however large the pulse beats, this is still a picture of great deficiency.
💬 Note from Doctor Luo: This is one of the hardest categories of illness in Chinese medicine: true cold with false heat (zhen han jia re). The patient appears to have a heat syndrome, but the root is deficiency — both yin and yang in the kidneys are insufficient, with yin the more depleted. Yang looks “in excess” only at a low baseline, and that extra yang floats outward: it drifts to the surface and produces fever, rises to the head and produces headache, dry mouth and restlessness. The ancients had a vivid saying: “水浅不养龙” — shallow water cannot nourish the dragon. A dragon belongs in deep water; when the water is too shallow, the dragon seems superfluous and flies up into the sky. That is the dragon-thunder fire rising (long lei zhi huo shang teng).
What is kidney essence, and why does its depletion cause fever?
To understand this case, you first need to grasp the weight of kidney essence (shen jing). Doctor Luo Dalun explains it at length in his lecture: the essence stored in our kidneys comes from two sources — first, our parents’ inheritance, called prenatal essence (xian tian zhi jing); second, the nourishment absorbed by the spleen and stomach from food and the clarity drawn from breathing, stored in the five organs, called five-organ essence (wu zang zhi jing). The two combine to become our kidney essence. Kidney essence is the most fundamental substance of the body — growth, development, reproduction, maturity, aging, all of it depends on this essence.
What nature does kidney essence have? It is neither purely yin nor purely yang — it contains the germs of both, the root substance standing between yin and yang. Essence transforms into qi, and qi in turn gives rise to kidney yin and kidney yang. So tonifying kidney essence generally requires tonifying both yin and yang: herbs that replenish kidney essence such as prepared rehmannia (shu di huang) form the base, with tian dong and mai dong to nourish yin if yin is deficient, or aconite (fu zi) and cinnamon (rou gui) to warm yang if yang is deficient.
💬 Note from Doctor Luo: Modern people have endless ways to drain kidney essence — staying up late, racking one’s brains over problems, both consume it. People with depleted kidney essence are everywhere today, yet the disease goes unrecognized, because the ancients called it “true yin” and spoke vaguely of it, and later theory never developed it properly. By the Qing dynasty, treatment of this condition was actually worse than in the Ming; and now hardly anyone recognizes it at all — just as Doctor Zhang Xichun explained “great qi sinking” so clearly, yet many people still don’t know it, and patients go years without being properly treated.
Symptom by symptom: deficiency fire at work everywhere
Xue Lizhai explained each of the old man’s symptoms: headache with fever — deficiency fire running upward and out to the surface; dizziness and urgent wheezing — upright qi insufficient, a sign that lung qi is nearly exhausted; profuse phlegm — lung qi insufficient together with spleen qi nearly exhausted, so water-dampness floods the body and turns to phlegm; frequent urination — kidney qi insufficient and powerless to restrain the fluids; dry mouth, thorns on the tongue, tongue shrinking like a lychee — deficiency fire above with the fluids drained dry; lower lip black and cracked — the stomach burning fiercely; face and eyes red, restlessness and sleeplessness, fire rushing up the throat — all are the floating of deficiency fire. And the old man’s body was especially sensitive, because when deficiency reaches a certain depth, the moment fire rises there is nothing left to hold it down.
💬 Note from Doctor Luo: Everyone must remember: this face of “red,” this body of heat, is an illusion. Never mistake it for excess heat and clear it — in reality, cold and yin are piled to the extreme inside, and just a little surplus deficiency fire floats upward. Get the direction wrong, and one dose of cold, cooling medicine finishes the patient.
Breaking down the prescription: Shiquan Dabu Tang to support upright qi, Bawei Wan to guide fire back to its origin
Doctor Xue Lizhai made his move: first Shiquan Dabu Tang (Ten Complete Great Tonification Decoction) — Sijunzi Tang combined with Siwu Tang, plus huang qi (astragalus) and rou gui (cinnamon), to support upright qi. Then he added shan zhu yu (cornus), ze xie (water plantain), mu dan pi (moutan bark), shan yao (Chinese yam), mai men dong (ophiopogon), wu wei zi (schisandra) and fu zi (aconite), one qian (about 3 g) of each. This combination is exquisite: Siwu Tang already contains shu di huang (prepared rehmannia), and adding shan zhu yu, ze xie, mu dan pi, shan yao and fu zi makes up Bawei Dihuang Wan — the Eight-Ingredient Pill, the Jin Gui Shen Qi Wan (Kidney Qi Pill from the Golden Cabinet). Then add rou gui, mai men dong and wu wei zi on top — Shiquan Dabu Tang supports upright qi, Bawei Wan guides the fire back to its origin and tonifies kidney essence, and mai dong with wu wei zi gathers and restrains the primal qi.
💬 Note from Doctor Luo: The thinking behind this prescription is what we always call “guiding fire back to its origin” (yin huo gui yuan): greatly tonify kidney essence, then use a small amount of cinnamon and aconite to draw the floating deficiency fire downward. Support upright qi and guide the fire at the same time — both hands working together.
One dose went down, and the old man slept deeply for a long time — sound, peaceful sleep. When he woke, his pulse and symptoms had each diminished by three to four tenths — he was three or four tenths better. Xue Lizhai then had him continue with Bawei Wan (Guifu Dihuang Wan) to nurse himself back, and gradually all the symptoms receded; afterwards he was told to avoid raw and cold food, and with slow convalescence he fully recovered. The remaining six or seven tenths of the illness were all cured by Bawei Wan alone.
The finishing touch: a large dose of prepared rehmannia with a tiny bit of cinnamon — and the fire comes down
The part of this case most worth pondering is the core pairing of Bawei Wan (Guifu Dihuang Wan): a large amount of shu di huang with just a little rou gui. The rehmannia, which tonifies kidney essence, is by far the largest dose; the cinnamon is only a tiny amount, just enough to draw the fire down. Doctor Luo Dalun shares a personal observation: used alone, shu di huang has little effect, and sometimes even stirs the fire up; match it with a tiny pinch of cinnamon, and the fire comes right down — this is one of the truly magical places in Chinese medical theory.
Where does this pairing come from? Zhang Zhongjing laid down this law long ago in the Jin Gui Shen Qi Wan (Kidney Qi Pill from the Golden Cabinet) in the Jingui Yaolue (Essentials from the Golden Cabinet) — the very formula we know today as Guifu Dihuang Wan.
💬 Note from Doctor Luo: This approach had enormous influence on later generations: Chen Shiduo’s Yin Huo Tang (Fire-Guiding Decoction) and Shou Huo Tang (Fire-Restraining Decoction), Zhang Jingyue’s Zhen Yin Jian (Settling-Yin Decoction) — all walk this same road, and all trace back to Zhang Zhongjing’s Jin Gui Shen Qi Wan and its law of “large rehmannia, small cinnamon.” For illnesses of kidney-essence deficiency with floating deficiency fire, a few doses will generally bring the fire down and stabilize the situation.
A bonus lesson: with this kind of deficiency fire, never clear heat
Doctor Luo Dalun meets far too many such patients in the clinic: chronic pharyngitis, trigeminal neuralgia, styes, toothache, sore throat, headache … When do these flare up most? After the winter solstice, in late winter and early spring, just as the yang of spring begins to stir — people with insufficient kidney essence fall ill the moment this season arrives; some even flare on the day of the winter solstice itself. Every year at this time he prescribes formulas like Yin Huo Tang, guides the fire down, and it clears immediately.
But treat it as excess fire, take heat-clearing, detoxifying medicines — and it only gets worse and worse.
💬 Note from Doctor Luo: So everyone must learn to recognize this “low-baseline deficiency fire.” Modern people waste kidney essence constantly, and the syndromes of kidney-essence deficiency with floating deficiency fire are extremely common. When you see fever or “heatiness,” don’t rush to clear the heat — ask first: where is this fire coming from? Is it excess fire or deficiency fire? Only when you know the source can you avoid treating it backwards.
In closing: why was Doctor Xue Lizhai so good at this illness?
Xue Lizhai understood this category of illness deeply because he was director of the Imperial Academy of Medicine, serving Ming Wuzong, the Zhengde Emperor (Zhu Houzhao) — the famous emperor who lived for pleasure. That emperor played too hard: he built a Leopard House (豹房) on the edge of Beijing, gathered beauties from all over the country, and reveled day and night. Xue Lizhai recorded in his writings: in serving Wuzong, he wore himself out with illness. Why? The emperor’s health would barely be patched up when he went back to playing; he played, got sick again — the imperial physician simply could not control him. The Zhengde Emperor died young, and the cause of his death is still a mystery — the story says he fell into the water while fishing and was gone, just like that.
💬 Note from Doctor Luo: The emperor loved his pleasures and Xue Lizhai could not govern him; but the illness, he saw with total clarity. So when he treated ordinary people, he was not shy at all — he wrote “took his concubine to bed” straight into the case record. The meaning is plain: at a certain age, you must be moderate and protect your kidney essence. Keep draining the essence, and illness follows right behind. The ancients said “temper desire, preserve essence” — that is no idle saying.
The lesson of this case: illness has true and false; heat has excess and deficiency. For an aged, weakened body, one indulgence can bring disaster; and “seeing heat and clearing it” is the beginning of countless mis-treatments. To nurture health, first nurture the essence — protecting kidney essence, the root of the body, matters more than anything.
Based on Doctor Luo Dalun’s lecture on the case records of Doctor Xue Lizhai; the case comes from Xue’s Case Records (《薛氏医案》).