Belly Pain from Cold with Pouring Cold Sweat? Doctor Luo Tianyi’s Hot-Iron External Treatment (Yunfa)

Patient search words: belly pain from catching cold / cold stomach / pain when eating cold food / ice-cold hands and feet / vomiting clear water ｜ Medical terms: cold congealing abdominal pain · qi accumulation under the ribs · spleen-stomach deficiency cold

Opening scene: this patient couldn’t get a single drop of medicine down

💬 Note from Doctor Luo: Today’s story is another case of Doctor Luo Tianyi. The illness itself was not the most dangerous we have met — but the treatment is a marvel of ingenuity: the doctor had the medicine all written up, yet the patient could not swallow even one mouthful — the moment it touched his lips, it came right back up. If the medicine cannot enter the stomach, how do you treat the disease? Doctor Luo Tianyi reached for a flat iron — yes, the very iron you press clothes with. This story is about yunfa, the ironing method, an external treatment you can easily do at home yourself.

Who was the patient? A 31-year-old scholar from Zhending

The patient was a xiushi of Zhending (present-day Zhengding, Hebei) — in other words, a scholar, thirty-one years old, in the very prime of life. But one look told Doctor Luo Tianyi everything: the man’s constitution was naturally frail — his physical foundation was never strong.

💬 Note from Doctor Luo: You know this place well from our stories — Doctor Li Dongyuan, Doctor Luo Tianyi, and their teacher Zhang Yuansu all lived in this region. After Doctor Luo Tianyi finished compiling his teacher’s works, he himself became an established physician of the first rank.

The old ailment: a “qi lump” under the left ribs — cold food meant pain

The scholar had a chronic complaint: a mass of accumulated qi under his left ribs.

💬 Note from Doctor Luo: “Under the ribs” means the sides of the body near the armpits. What does accumulated qi mean? It means qi has gathered there and is blocking the movement of qi and blood; sometimes you can clearly feel as if something is inside. If it feels hard and does not move when pressed, it is called a blood accumulation (xue ji); if it shifts faintly and moves a little under the fingers, it is a qi accumulation (qi ji). This patient’s lump was a qi accumulation.

Because of this lump, he dared not eat cold food — the moment he did, it hurt, because cold causes pain. And when he ate it, he would vomit clear water; he also became dizzy, so dizzy he did not dare open his eyes; loud voices and bustling company annoyed him. In ordinary times, however, the illness was not fierce: lying quietly for a day or two and drinking some acrid, warming medicine would usually press it down.

This time it was serious: early autumn of the jiaxu year, worn out and chilled

Then came the early autumn of the jiaxu year — trouble. He had overworked himself (exhausted by heavy labor), and on top of that ate cold food — and the illness flared up violently all at once.

💬 Note from Doctor Luo: Why does illness strike when one is tired? Exhaustion consumes the upright qi (zheng qi); once the upright qi is deficient, the cold pathogen slips in through the gap — this is the principle “where the pathogen gathers, the qi must have been deficient.”

This attack was far worse than any before: unrelenting abdominal pain, with cold sweat pouring out (the sweat itself was cold); four-reversal — hands and feet icy cold; the breath from his mouth and nose was cold too; his complexion was grayish-yellow and lusterless. Worst of all — he could not even lie down; he could only sit propped against a low table. He also coughed, and his throat, chest and diaphragm felt obstructed, as if phlegm were stuck inside.

Doctor Luo Tianyi opens with the Huangdi Neijing: cold is the culprit — warmth stops it

Doctor Luo Tianyi first sorted out cold versus heat, yin versus yang.

💬 Note from Doctor Luo: Physicians of old often quoted the Huangdi Neijing (Inner Canon) — not to show off their learning, but because the roots of Chinese medical theory lie in the Neijing. Doctor Luo Tianyi did the same: he cited three passages and laid the whole principle bare.

He quoted the Neijing: “When cold qi lodges between the membranes of the small intestine and in the network vessels, the blood congeals and cannot flow into the great channels; the qi and blood stagnate and cannot move” — cold stays in the body, blocks the collateral vessels, and the qi and blood can no longer travel; over time, accumulations form. He also quoted: “When cold qi lodges in the stomach and intestines, it surges upward in reverse, so there is pain and vomiting” — external cold enters the stomach and intestines and pushes upward, producing both pain and vomiting. And the most crucial line of all: “When various colds cause pain within, warmth stops the pain at once” — pain caused by cold ceases the moment it receives warmth.

This whole run of signs — abdominal pain, cold sweat, cold hands and feet, cold breath, grayish-yellow complexion — none of it was heat. It was all insufficiency of yang qi with cold pathogen invading within. The treatment principle was therefore settled: warmth.

The hard part: medicine came right back up

The direction was fixed, and Doctor Luo Tianyi prescribed warming, yang-supporting herbs. And then — the patient could not drink them!

💬 Note from Doctor Luo: His stomach had weakened to the extreme, and the cold was heavy; the sight of medicine made him vomit — not a drop would go down. This stumped the physician: if the medicine cannot be fed in, how do you treat the illness? Doctor Luo Tianyi knitted his brow, and an idea came: if oral administration fails, then treat externally — use the ironing method (yunfa)!

Ancient wisdom: ironing the medicine’s qi into the belly with a flat iron

Doctor Luo Tianyi wrote the method out in great detail in his book — you can follow it exactly:

💬 Note from Doctor Luo: Prepare three things: half a jin (about 250 g) of cooked moxa (shu ai), a good amount of large scallions, and a sheet of xuan paper. First lay the xuan paper (today, gauze or a single layer of cotton cloth works fine — in the Jin-Yuan period the paper was made of grass and was soft and breathable) over the belly; spread the cooked moxa evenly over it; then split the scallions in half lengthwise (with the roots attached they act more powerfully — you can also chop them into bits), lay them layer upon layer on top of the moxa, several layers deep; cover the top with another sheet of paper. Then iron it with a slow-fire flat iron (yun dou) — put gentle charcoal inside the iron; the fire must not be too hot — slow fire only; glide it back and forth slowly over the cloth, swapping the iron for a hot one whenever it cools.

How do you know when it is done?

💬 Note from Doctor Luo: Iron until you feel heat rising inside your belly, and the skin gets almost too hot to bear — at that point wrap the belly in a padded jacket and tie it closed, letting the warmth seep inward gradually; when the scallions and moxa cool down slowly, untie and remove them. If your home has no old-style flat iron, an electric iron set to low heat works just as well; for the moxa you can simply buy good moxa sticks (ai tiao), tear off the paper wrapper, and use the moxa floss inside. That is the secret of the ironing method: lay the medicine on the body surface, heat it from outside, and iron it again and again like pressing clothes, so the medicine’s qi rides the heat, penetrates the skin little by little, and enters the channels — warming the yang qi and driving out the cold pathogen.

The flat iron is no foreign import: China had it in the Shang and Zhou; the West only saw it sixteen hundred years later

💬 Note from Doctor Luo: You may ask — did people in the Jin-Yuan period even have flat irons? They certainly did — China has had them since the Shang and Zhou dynasties: a long handle with a bowl-shaped bronze head, charcoal burning inside; ancient emperors used them to press their robes before going out, and to fumigate them with incense along the way. The West did not invent the iron until more than sixteen hundred years later — the Chinese were already using it long before. And Chinese medicine did not stop at pressing clothes with it: it used the iron to press away illness — the ironing method is one of the classic external treatments of Chinese medicine.

Ironing away: the belly warmed, the pain stopped

The effect was immediate: the moment the ironing began, the warm medicine-qi seeped in and the pain started to ease; the hotter it grew, the more the pain subsided — when the belly was thoroughly warm, the pain stopped entirely.

💬 Note from Doctor Luo: This is exactly what the Neijing meant by “warmth stops the pain at once.” The man who could not even lie down — that very night, he slept! The next day Doctor Luo Tianyi gave him a warming, yang-supporting formula matched to his pattern, and the illness was essentially cured. Doctor Luo Tianyi took the trouble to record this method in his book, saying: in the future, whoever suffers pain caused by cold should use this ironing method.

A bonus story: Doctor Xu Lingtai and Mo Xiudong — doctor and patient as kindred spirits

💬 Note from Doctor Luo: Speaking of the ironing method reminds me of a case treated by the great Qing dynasty physician Doctor Xu Lingtai (a native of Suzhou, ranked alongside Doctor Ye Tianshi) — a patient named Mo Xiudong of Wuzhen. By day he was a perfectly healthy man; by night he ached all over as if beaten with clubs, howling in agony, until he had spent every penny of the family fortune. His mother’s heart was breaking; she could bear it no longer and was ready to drown herself. Doctor Xu Lingtai took one look: pain by day, none — pain by night — this was blood stasis! The earlier physicians had not distinguished the pattern, which is why they could not cure it. Doctor Xu Lingtai brought out every technique in the book — decoctions, acupuncture, moxibustion, steam fumigation, ironing — and cured him quickly. Mo Xiudong knelt and knocked his head on the ground, thanking the doctor for saving his life — but Doctor Xu Lingtai said: “Don’t thank me — I must thank you. You are my kindred spirit!” An ordinary patient drinks two doses, sees no result, and walks away; but you truly trusted me and let me bring out all these methods of Chinese medicine — you have completed my learning. It is a true gem of a story about the bond between physician and patient in ancient times.

Xun, zheng, yu, tang — four characters, four very different methods

Finally, a word on the finer points of external treatment — xun (fumigation), zheng (steaming), yu (ironing), and tang (scalding) are not the same thing at all:

💬 Note from Doctor Luo: Xun means taking aromatic herbs (for example, the guan zhong (cyrtomium), huo xiang (patchouli), pei lan (eupatorium), bai zhi (Dahurian angelica), du huo (pubescent angelica) people used during the epidemic) and burning them so the smoke fumigates the room; zheng means boiling the herbs in water and letting the steam rise to steam the body; yu is what we talked about today — laying medicine on the body surface and heating it with an iron from outside; tang — we can talk about it another time. The ancients summarized these methods with four characters: jian, bian, xiao, lian — simple, convenient, effective, and inexpensive. There is art in the moxa too: wormwood cut and dried in the sun is called sheng ai (raw moxa); set aside for a full three years it becomes chen ai (aged moxa); and aged moxa ground and pounded repeatedly into fine floss is shu ai (cooked moxa) — the moxa sticks you buy today are almost all cooked moxa, and the older, the better; a label like “25:1” means 25 jin of wormwood leaves yield 1 jin of moxa floss — carefully selected.

This is remarkably practical even today: many people now have insufficient yang qi — air-conditioning, underdressing in cold weather — and after catching cold they get vomiting, diarrhea and belly pain (what is commonly called gastroenteritis). Plenty of them end up on IV drips — but most antibiotics are cold and cooling in nature, and when that cold fluid goes in, the diarrhea sometimes refuses to stop for a long time. In such a pinch: take Fuzi Lizhong Wan (Aconite Pill to Regulate the Middle) by mouth (though you must wait for the medicine to act), moxa the belly if you have moxa sticks at home, or else do a bit of ironing — you can even mix some minced ginger into the moxa floss, or lay a slice of ginger under it.

💬 Note from Doctor Luo: The ancients were truly clever — they worked out so many ways to regulate the body, and you can use them at home yourself. The more you learn, the better you can protect yourself and your family — that is the point of telling these stories every day.

The original case is from Weisheng Baojian (Precious Mirror of Hygiene) by Doctor Luo Tianyi; the commentary is based on public lectures by Doctor Luo Dalun (PhD in TCM Diagnostics, Beijing University of Chinese Medicine).