What Xie Huang San is for
The skin around the mouth is where it shows: a red band on the chin and upper lip, sometimes reaching the nose, with the lip line itself cracked and sore. The redness is bright and the border fairly clear, and the surrounding skin may be a little greasy. The explanation is Heat in the Spleen and Stomach channels, which run through the lips and the face, and the formula drains that Heat rather than only cooling the surface.
The distribution is the diagnostic point. The rash keeps to the mouth, the lip margin, the nasolabial folds and sometimes the side of the nose, and it spares the rest of the face. The lips crack at the centre and at the corners, and the tissue feels tight and hot rather than itchy. A yellow coat on the tongue and a robust, thirsty person fit the same picture. The redness is full rather than dusky.
Shi Gao clears the Heat strongly while protecting the fluids, so the cooling does not leave the area drier still. Zhi Zi drains the Heat downward and gives it a route out, and Fang Feng disperses it outward so it is not held at the surface. Huo Xiang transforms the Dampness that commonly travels with Heat in the middle, and Gan Cao harmonises the group. The result is a small cooling formula with one dispersing herb, so the redness settles instead of being pushed back in.
It is a short course, stopped when the redness and the cracking settle. Cold or deficient patterns are the wrong indication, and so is dryness without heat, which the draining herbs would aggravate. Because the minerals in it can affect how other medicines are absorbed, it is separated from them in the day. A persistent perioral rash also requires reviewing the products being applied to the area.
Actions
- Drains Spleen and Stomach Heat
- Clears Heat from the face and mouth
- Disperses Heat outward
- Transforms accompanying Dampness
Properties
- Taste and temperature: Predominantly sweet and pungent with a cold quality. Sweet and cold clear Heat, pungent disperses it outward.
- Organs: Spleen, Stomach
- Channels: Spleen, Stomach
The pattern behind it
The pattern is Spleen and Stomach Heat rising along the channel to the lips and face. The Heat produces the redness, the cracking and the thirst. The formula clears and drains that Heat, with a dispersing herb to move it outward, which is why it is used for perioral and lip problems.
Composition
The herbs in Xie Huang San, with their role and dose.
| Role | Herb | Dose | Properties | Why it is there |
|---|---|---|---|---|
| Shi Gao | 15 g | Cold, Sweet, pungent | Clears the Heat strongly while protecting fluids. | |
| Deputy | Zhi Zi | 3 g | Cold, Bitter | Drains Heat downward through the urine. |
| Assistant | Fang Feng | 12 g | Slightly warm, Pungent, sweet | Disperses the Heat outward, so it leaves rather than being trapped at the surface. |
| Envoy | Huo Xiang | 5 g | Slightly warm, Pungent | Transforms the Dampness that commonly accompanies Heat in the middle. |
| Gan Cao | 9 g | Neutral, Sweet | Harmonises the formula and supports the middle. |
Patterns it treats
Stomach Fire
Redness and cracking around the mouth, lips and nose, with the lip line sore and the surrounding skin bright rather than dusky. Heat in the Spleen and Stomach channels rises to the lips and face, and the formula drains it so the redness settles instead of returning.
How the formula is built
One herb clears, one drains, one disperses and one transforms, with Gan Cao harmonising. That combination is unusual in a cooling formula: the dispersing herb ensures the Heat has a route outward rather than being held at the surface.
Skin conditions it is used for
Where this formula appears in the skin conditions of the library.
Preparation and use
Taken as a powder in warm water, or decocted, in two divided doses.
Modifications
- If the Heat is marked, the cooling herbs are increased.
- If Dampness accompanies it, the aromatic herb is increased.
- If the lips are badly cracked, moistening herbs are added.
- If the pattern is cold, this formula is not used.
Timing
Taken in two divided doses.
Duration
Short course: three to seven days, reassessed.
Diet while taking it
Avoid fried, spicy and sweet food, and alcohol, which add to Stomach Heat.
Safety
Contraindications
Avoid in cold or deficient patterns. Avoid in dryness without Heat. Perioral dermatitis should also have aggravating topical products reviewed.
Interactions
The mineral content can affect absorption of some medicines, so it should be separated from other medication.
Pregnancy
Use with caution in pregnancy; the formula is mild but professional guidance is appropriate.
Breastfeeding
Use only under professional guidance.
Children
Commonly used in children with reduced dose for perioral and lip heat.
Before you use it
Recorded from the classical record and rewritten in this project's own words. Educational only: not a prescription, and persistent perioral rash needs medical assessment.
General safety references
General references for herbal hepatotoxicity and herb-drug interactions; they are not specific to this formula.
- Review article: Herbal hepatotoxicity - an update on traditional Chinese medicine preparations. Alimentary Pharmacology & Therapeutics, 2014. PMID: 24844799.
- Interactions between herbal medicines and prescribed drugs: an updated systematic review. Drugs, 2009. PMID: 19719333.
- Warfarin and food, herbal or dietary supplement interactions: a systematic review. British Journal of Clinical Pharmacology, 2021. PMID: 32478963.
Origin and history
Xiao Er Yao Zheng Zhi Jue (小儿药证直诀, Key to Therapeutics of Children's Diseases) by Qian Yi, Song dynasty, around 1119 CE.
Qian Yi wrote the formula for children with Heat in the Spleen and Stomach channels, which show at the lips and mouth. Its combination of clearing with dispersal is a small but elegant example of the tradition's approach to heat that needs a route out.
Classical record
Qian Yi recorded the powder for Spleen and Stomach Heat in children affecting the mouth and lips, draining the Heat rather than only cooling the surface.
Xiao Er Yao Zheng Zhi Jue (小儿药证直诀, Key to Therapeutics of Children's Diseases), Qian Yi, Song dynasty.
Evidence note
No controlled trial of this treatment in skin conditions was identified for this entry. What is described here rests on the classical and later materia medica record and on traditional clinical use, not on controlled trial evidence, and it is not a prediction of benefit. Where skin-specific research does exist it is linked above.
Common questions
What is it used for?
Redness and cracking around the mouth and lips with a yellow tongue coat and thirst, in a short course.
Why does it contain a dispersing herb?
So the Heat has a route outward instead of being held at the surface. Dispersal is unusual in a cooling formula and is the point here.
Can it help perioral dermatitis?
Where the Heat signs are present. Perioral dermatitis also needs aggravating products identified and medical advice sought.
How long is it used?
Three to seven days, then reassessed.