What Bai Hu Tang is for
Bai Hu Tang is for skin that flushes red and hot all over during strong febrile Heat, or turns mottled where the Heat moves unevenly through the surface. It is a cooling formula, built to take that colour down without drying the skin.
The skin change is one of colour rather than texture: the face and trunk go bright red and feel hot to the touch, or the surface becomes mottled with patches of red and pale that shift. There may be no true rash, no scale and no weep. The Heat is at the Qi level, the layer between the interior and the surface, so it shows as warmth and colour pushed outward rather than as a lesion. The skin looks flushed and dry rather than inflamed or broken.
Shi Gao is a cold mineral given in a large dose, and it clears the Heat while holding the fluids, so the skin cools without being left parched. Zhi Mu cools and nourishes Yin at the same time. Gan Cao and Jing Mi protect the Stomach so the cold minerals can be taken in quantity. The design is simple and deliberate: bring the surface colour down, and keep the skin and the fluids intact while doing it.
It is not for the pale, dry skin of deficiency, nor for cold skin where cooling would deepen the problem. It is an acute formula, used for a short course and stopped as soon as the colour settles. A high fever with flushing needs medical assessment rather than self-treatment, and the formula is never a substitute for that assessment or for urgent care.
Actions
- Clears strong Heat from the Qi level
- Protects the fluids
- Relieves fever and thirst
- Cools flushed and mottled skin
Properties
- Taste and temperature: Predominantly sweet and pungent with a cold quality. Sweet and cold clear Heat and protect fluids, pungent disperses the Heat outward.
- Organs: Stomach, Lungs
- Channels: Stomach, Lung
The pattern behind it
The pattern is strong Heat at the Qi level. The Heat is intense enough to produce high fever, profuse sweating and thirst, and because it is at the Qi level it has not yet entered the Blood. The formula clears it with a large dose of a cold mineral while protecting the fluids.
Composition
The herbs in Bai Hu Tang, with their role and dose.
| Role | Herb | Dose | Properties | Why it is there |
|---|---|---|---|---|
| Deputy | Shi Gao | 30 to 60 g | Cold, Sweet, pungent | Clears strong Heat and protects the fluids, given in a large dose. |
| King | Zhi Mu | 9 to 18 g | Cold, Bitter, sweet | Clears Heat and nourishes Yin, supporting the cooling without drying. |
| Envoy | Gan Cao | 3 to 6 g | Neutral, Sweet | Harmonises the formula and supports the Stomach. |
| Jing Mi | 6 to 15 g | Neutral, Sweet | Protects the Stomach and the fluids while the cold minerals are given. |
Patterns it treats
Qi Level Heat
Skin that flushes bright red and hot, or turns mottled with shifting patches of red and pale, during strong febrile Heat. The Heat sits at the Qi level and shows as colour and warmth at the surface rather than as a rash.
How the formula is built
A large dose of a cold mineral, supported by a second cooling herb and protected by two starchy substances. The design is simple: clear the Heat strongly, but do not damage the Stomach or dry the fluids in the process.
Skin conditions it is used for
Where this formula appears in the skin conditions of the library.
Preparation and use
Decocted in water and taken warm, in two or three divided doses.
Modifications
- If the fluids are damaged, more moistening herbs are added.
- If the Heat enters the Blood, a different formula is used.
- If the person is depleted, the dose is reduced.
- If the fever is not from Heat, the formula is not used.
Timing
Taken warm in two or three divided doses.
Duration
Acute use: one to five days, discontinued as soon as the fever breaks.
Diet while taking it
Cool fluids in small sips; light easily digested food during recovery.
Safety
Contraindications
Avoid in exterior patterns where the pathogen is still on the surface, and in deficiency heat or cold patterns. A high fever needs medical assessment.
Interactions
The mineral content can affect absorption of some medicines, so it should be separated from other medication.
Pregnancy
Generally considered safe for short-term acute use in pregnancy when the pattern clearly matches, under professional guidance.
Breastfeeding
Use only under professional guidance.
Children
Used only with professional supervision for febrile illness.
Before you use it
Recorded from the classical record and rewritten in this project's own words. Educational only: not a prescription, and a high fever, especially with a rash or confusion, needs urgent 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.
Selected PubMed records
Real PubMed records for the modern, non-TCM discussion of this formula. They are references, not a claim that the formula is proven for any skin condition.
- Ginseng-plus-Bai-Hu-Tang Combined with Western Medicine for the Treatment of Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis.. Evidence-based complementary and alternative medicine : eCAM, 2022. PMID: 35469158.
Origin and history
Shang Han Lun (伤寒论, Treatise on Cold Damage) by Zhang Zhongjing, Eastern Han dynasty, around 220 CE.
Bai Hu Tang is one of the oldest formulas in the tradition, recorded by Zhang Zhongjing for the most intense form of Qi-level Heat. Its name, white tiger, refers to the cool metal quality of the formula, and its four ingredients have remained unchanged for nearly two thousand years.
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 are the four big signs?
Big fever, big sweating, big thirst and a big forceful pulse. Those four together define the pattern.
Can it be used for a rash?
Only where the rash appears with the four big signs, and only alongside medical assessment of the febrile illness.
Why is a mineral used?
Shi Gao is a cold mineral that clears strong Heat without drying the fluids, which is why it can be given in large doses.
How long is it used?
One to five days, stopped as soon as the fever breaks.