Mouth Ulcers That Keep Coming Back and Flare Up After Ginger or Garlic

Patient’s search terms: mouth ulcers / canker sores / tongue sores / mouth sores / getting heaty after ginger or garlic / deficiency fire / too much phlegm

Medical terms: recurrent oral ulcers · canker sores · fire not returning to its source · kidney essence deficiency · deficiency fire flaring upward

Opening: this patient was Doctor Xue Lizhai’s own brother

Today’s patient is not an outsider — he is the elder brother of Doctor Xue Lizhai, the director of the Imperial Academy of Medicine in the Ming dynasty. Xue Lizhai’s father had been an imperial physician, and he inherited his father’s learning; his elder brother, however, never studied medicine and probably went into the official career. The case record calls him “先兄” — the elder brother who has already passed away. Doctor Luo Dalun says that if you truly understand this one case, you have understood half of the Chinese-medicine approach to regulating the body.

💬 Note from Doctor Luo: Xue Lizhai was the director of the Imperial Academy of Medicine in the Ming dynasty and left behind more than three thousand case records. He placed tremendous emphasis on supporting upright qi, and his way of thinking fits modern people extremely well — many of the problems modern bodies have can be solved on your own using his methods. This is a long-term nurturing, protective approach; learning it will only do you good.

A big, tall “sturdy fellow” — actually deficient all over

First look at this brother’s constitution: 体貌丰伟 — a tall, big, plump, sturdy build. When novels describe a character this way, it means handsome and imposing. But in case records, Doctor Luo says, “体貌丰伟” is usually not good news — because a great many of those big, sturdy people are actually deficient obesity (xu pang).

Now look at his complaints: 吐痰甚多 — he sputtered phlegm constantly, phlegm coming up all day long; 脉洪有力 — his pulse was full and forceful, beating strongly; yet 数不耐劳 — he could not tolerate fatigue, tired after the slightest work and barely able to keep going; and most alarming of all, 遇风头晕欲扑 — when the wind blew on his head, he became so dizzy he felt he was about to topple over.

💬 Note from Doctor Luo: When modern people have too much phlegm, we usually blame pollution and bad air — but that is not the only cause. A great many people, especially men past middle age, have too much phlegm because they are actually deficient: the upright qi of the spleen and kidney is insufficient, so the body cannot transform and move water-dampness; the dampness cannot be expelled, gradually condenses into phlegm, is stored in the lungs, and is then coughed up from the throat. A “full and forceful pulse” looks strong, but it is really deficiency; “intolerance of fatigue” tells you the qi is deficient or the kidney qi is insufficient. Dizzy enough to topple when the wind blows — that is deficiency to a serious degree. In northern winters, you go out and the wind hits your head, your brain goes “whoosh,” and you stand there unsteady on your feet — that is exactly what profound deficiency looks like.

Dizzy whenever the wind blows — why?

Why does the wind make him dizzy? Doctor Luo explains: our wei qi and ying qi (defensive and nutritive qi, ying-wei) circulate through the whole body and protect the body surface. When upright qi is insufficient, the ying-wei system is weak, and changes in outside temperature and humidity easily disturb the body — you have no strength to “regulate” the external environment. This dizziness actually comes with sensations in the hands and feet too — they feel cold in the wind. The head is the most obvious because the clear yang qi cannot rise (qing yang zhi qi wu yi ti sheng) — the top of the head is the most exposed to changes in outside temperature.

💬 Note from Doctor Luo: When you meet this situation, you know it is qi deficiency — especially qi deficiency to the point where clear yang qi no longer rises. This reminds us: dizziness is not always “heat” or high blood pressure. A great many people are deficient — so deficient that the qi cannot even come up.

The worst of it — this mouth: red and broken, one bite of ginger or garlic and it ulcerates

The brother had one more affliction that mattered most: 口舌破裂，或赤烂 — his mouth and tongue were cracked and ulcerated, even festering — the tongue very red, broken, sometimes raw, and the broken places burning red. Worse still, if he carelessly ate a little ginger or garlic, the mouth sores erupted violently, the whole mouth covered in ulcers.

Put this symptom in front of an ordinary person and everyone will say: this is fire! This is heat! The tongue is red and ulcerated — if that is not “heaty,” what is? So what do most doctors do? Either clear heat, or resolve toxins, or nourish yin.

💬 Note from Doctor Luo: Pay attention — not all mouth ulcers are “fire” and need heat-clearing! A great many mouth ulcers are actually yang deficiency — kidney essence insufficiency, yang deficiency producing deficiency fire. Look at this brother: the pulse, the stamina, the dizziness — everything is deficiency. Where is the real fire? So Xue Lizhai’s judgment ran exactly opposite to the average person’s intuition.

Doctor Xue Lizhai’s one-line verdict: the mingmen is deficient, and the fire does not return to its source

How did Xue Lizhai judge it? Four characters: 命门虚，火不归元 — the mingmen (life-gate) is deficient, and the fire does not return to its source.

What does this mean? Doctor Luo says the concept of “fire not returning to its source” (huo bu gui yuan) was explained most clearly by the physicians of the Ming dynasty — including Zhang Jingyue, Chen Shiduo and others; it is one of the outstanding achievements of Ming-dynasty medicine. “The mingmen is deficient” means the kidney is deficient; “the fire does not return to its source” means deficiency fire runs upward because it cannot hide and settle in the kidney.

💬 Note from Doctor Luo: How does this actually form? It is kidney essence insufficiency, leaning toward yang deficiency. When kidney essence is depleted, both kidney yin and kidney yang are insufficient; water is not enough, so the fire runs upward. Think of it this way: normally kidney yin is 100 and kidney yang is 100. Now kidney yin is down to 50 and kidney yang to 60 — yang is a little higher than yin, but both are far short of 100. The extra 10 points of fire go “whoosh” — straight up. This is called dragon-thunder fire blazing upward (long lei zhi huo shang fan), or “the water is too shallow to support the dragon” (shui qian bu yang long).

Tonify kidney yin or kidney yang? Neither — tonify kidney essence

So how to treat it? Doctor Luo stresses one concept above all — kidney essence (shen jing). What is kidney essence? The source substance of life, standing between yin and yang. Daoism says “the Dao gives birth to One, One gives birth to Two, Two gives birth to Three, Three gives birth to the ten thousand things” — and that “One” is the essence.

💬 Note from Doctor Luo: Only when you put “essence” in its proper place can you regulate this kind of body condition. Many people today think “essence” equals “yin,” and that tonifying kidney essence means nourishing yin — that is wrong. Tonifying kidney essence means: according to how yin and yang are deficient, add yin-nourishing herbs where yin is short and yang-warming herbs where yang is short, and bring both kidney yin and kidney yang back up to 100 so that kidney qi runs normally — that is the healthy state of a human body.

The prescription: Bawei Wan as the base — shu di huang with rou gui and fu zi, to pull the fire back down

What formula did he use? Bawei Wan (Eight-Ingredient Pill) — that is Gui Fu Di Huang Wan, the same as Zhang Zhongjing’s Jinkui Shenqi Wan (Kidney Qi Pill from the Golden Cabinet). The core of this approach is a large dose of shu di huang (prepared rehmannia) — the main herb for tonifying kidney essence — paired with shan yu rou (cornus fruit) and huai shan yao (Chinese yam), both of which tonify the essence of the five organs. Then come the three “draining” herbs: fu ling (poria) to drain dampness from the spleen, ze xie (alisma) to drain dampness from the kidney, and mu dan pi (moutan bark) to clear fire from the liver. Why add draining herbs at all? Because if you tonify too hard you get “deficiency cannot accept tonics” (xu bu shou bu); the draining herbs clear the way so the essence-tonics can actually get in. And the crucial final touch is rou gui (cinnamon bark) and fu zi (aconite) — warming yang and guiding the stray deficiency fire back down.

💬 Note from Doctor Luo: Shu di huang paired with rou gui, paired with fu zi — this is the most central combination there is: guiding fire back to its source (yin huo gui yuan). Deficiency fire is not real fire; it is fire with nowhere to stay that has run up to the surface. Rou gui and fu zi draw it back into the kidney. The many “Guide Fire” (Yinhuo Tang) type approaches I have talked about all trace back to Zhang Zhongjing’s kidney qi pill thinking, and by the Ming dynasty they were fully refined. For an illness like this brother’s, if you clear heat and resolve toxins — give him Niuhuang Jiedu Pian (Bezoar Detox Tablets) — it works for a day or two, and then it flares right back; that is the wrong direction. Keep tonifying kidney essence and guiding the fire home, and a few doses will cure it — immediate, decisive effect.

Tonifying the kidney alone is not enough: add Buzhong Yiqi Tang

But this brother had another problem: his qi was also profoundly deficient — dizziness, intolerance of fatigue. Can you treat that by tonifying the kidney alone? No. Xue Lizhai paired in Buzhong Yiqi Tang (Tonifying the Middle and Replenishing Qi Decoction), adding a little fu zi to warm yang. Why?

💬 Note from Doctor Luo: Using Buzhong Yiqi Tang alone carries a risk: when you lift the qi of a qi-deficient person upward, and the kidney qi below has no solid root, the lower part gets “lifted out” (ti tuo) — the qi is raised, the bottom becomes even emptier, and the person actually gets dizzier. So you must tonify the kidney (give the qi a root to stand on) and supplement the qi (lift the qi back up into place) at the same time — tonify the kidney and tonify the qi together. Xue Lizhai’s arrangement for his brother was: morning — Buzhong Yiqi Tang to lift the yang qi; evening — Gui Fu Di Huang Wan (or Liuwei Dihuang Wan) to let the kidney store it — a daily cycle. This is the usage I admired most when I studied Xue Lizhai’s books. Many friends have used these two patent medicines and slowly built up a solid foundation; after that, going to a Chinese-medicine doctor for fine-tuning is far easier — with sufficient upright qi, you have “ammunition” to fight with.

One dose and it was cured — but a month after stopping, everything came back

What was the result? 服药即愈 — the moment he took the medicine, the symptoms vanished. But here is the problem: a little over a month after he stopped, all the symptoms returned.

What is going on? Was Xue Lizhai incompetent — unable even to cure his own brother? Doctor Luo says: don’t think that way — sometimes you can cure the disease, but you cannot cure the person’s fate.

💬 Note from Doctor Luo: Life is your own. Some people will not change their habits: when they come to you for a prescription they are devout — sending Maotai, pulling strings, saying whatever you want to hear. The moment the prescription is in their hand, it is back to overtime, back to drinking, night after night of revelry. After two visits you don’t need to see them again — you cannot cure their fate. Others, the moment their kidney qi feels replenished, immediately plunge back into sexual excess — effective for a while, relapse within a month. Look at the later cases in Xue Lizhai’s records: they all note that the patient “observed the prohibitions” and changed his lifestyle — and that is why those patients recovered. Only this case says nothing of the kind — with his own brother, there was little he could say. Tell him to exercise? He is fat, he won’t. Tell him to abstain? He won’t listen. Tell him not to be so busy? Impossible — he must earn his “little target,” must get promoted. Sometimes the relatives of a famous doctor obey him even less than strangers do.

A bonus: if you want a healthy body, you cannot rely on medicine alone

The formula in this case is simple, but the principle behind it is something Xue Lizhai did not write down. Doctor Luo says he places great importance on medical education — if you only hand out prescriptions without explaining the reasoning, the patient finishes the medicine and walks back onto the old road, and the illness only gets worse: once he has been supported, he feels he has a crutch, “the medicine will prop me up,” and indulges even more.

💬 Note from Doctor Luo: Taking medicine is only an adjusting tool — not the whole story. You also have to adjust your way of life: exercise when you should, change habits when you should. And here is one more diagnostic rule worth learning: for heat symptoms of the head and face — the chronic, long-lasting kind, the constant phlegm, the toothaches, the mouth ulcers — I mostly suspect kidney essence deficiency with deficiency fire flaring upward. Real excess fire is the sort you see after a cold: a swollen, sore throat, inflammation, damp-heat. So don’t clear heat at every flare-up; first ask yourself whether this is deficiency. Use the fire-guiding approach, and a few doses usually do the job — that is the biggest reminder “fire not returning to its source” has to offer.

Compiled from Doctor Luo Dalun’s explanation of Doctor Xue Lizhai’s case records; the case comes from Xue’s Case Records (薛氏医案).