What Zhi Dai Fang is for
The skin is hot, damp and itchy where the body folds: genital skin, groin, inner thighs, under the breasts. The formula clears the Damp-Heat that keeps that skin sodden and inflamed, and drains it downward so the surface dries from within rather than being dried on top.
The skin looks sodden rather than simply red. It is dusky or beefy red, macerated where surfaces touch, and itchy in a way that is worse for warmth and for tight clothing, so scratching leaves it raw and weeping. The tissue around the itch looks puffy and damp rather than dry and scaly, and it does not settle while the fold stays wet. Where a discharge is present it is thick and yellow and keeps the skin damp, which is why the surface never gets the chance to dry. The same picture can appear in any fold, but the cause is one: Heat and Dampness sitting together in the lower body.
Yin Chen and Huang Bo clear the Damp-Heat below, Zhi Zi and Mu Dan Pi cool the Heat and the Blood, and Fu Ling, Zhu Ling, Ze Xie and Che Qian Zi drain the Dampness downward so it leaves the tissue instead of sitting in it. Chi Shao cools and moves the Blood where the skin is inflamed, and Chuan Niu Xi carries the action down. Cooling and draining work together: cold alone would leave the Dampness trapped, and draining alone would leave the Heat behind.
It is not for pale, cold, watery patterns or for skin that is dry and thin with no Dampness, where draining would leave the surface more brittle than before. Courses are short, one to two weeks at a time, with the skin reassessed in between. Persistent itch, a lesion that changes or a discharge that keeps returning needs medical diagnosis, because a formula cannot settle a cause it has not identified.
Actions
- Clears Heat and drains Dampness
- Stops abnormal discharge
- Relieves itching and dampness in the lower body
- Cools the Blood
Properties
- Taste and temperature: Predominantly bitter and bland with a cold quality. Bitter clears Heat, bland drains Dampness.
- Organs: Spleen, Kidney, Bladder, Liver
- Channels: Spleen, Kidney, Liver
The pattern behind it
The pattern is Damp-Heat in the lower body producing discharge. The Heat makes the discharge yellow and malodorous, the Dampness makes it thick, and both produce the itch. The formula clears and drains, which is why it is used for the hot damp pattern rather than for a cold one.
Composition
The herbs in Zhi Dai Fang, with their role and dose.
| Role | Herb | Dose | Properties | Why it is there |
|---|---|---|---|---|
| Yin Chen | 12 to 15 g | Slightly cold, Bitter, pungent | Clears Damp-Heat and is used for hot damp conditions of the lower body. | |
| King | Huang Bo | 6 to 10 g | Cold, Bitter | Clears Heat and dries Dampness in the lower body. |
| King | Zhi Zi | 6 to 10 g | Cold, Bitter | Clears Heat from the three burners and drains it downward. |
| Fu Ling | 9 to 12 g | Neutral, Sweet, bland | Drains Dampness and supports the Spleen. | |
| Zhu Ling | 9 to 12 g | Neutral, Sweet, bland | A strong draining herb that clears Dampness through the urine. | |
| Ze Xie | 9 to 12 g | Cold, Sweet, bland | Drains Damp-Heat downward through the urine. | |
| Mu Dan Pi | 6 to 10 g | Slightly cold, Bitter, pungent | Cools the Blood and clears Heat. | |
| Chi Shao | 6 to 10 g | Slightly cold, Bitter | Cools and moves Blood, addressing the inflammation. | |
| Envoy | Che Qian Zi | 6 to 10 g | Cold, Sweet | Drains Damp-Heat through the urine. |
| Chuan Niu Xi | 6 to 10 g | Neutral, Bitter, sour | Strengthens the lower body and moves Blood downward. |
Patterns it treats
Damp-Heat
Dusky red, sodden and itchy skin in the folds, macerated where surfaces touch and raw where it has been scratched, with a thick yellow discharge keeping it damp. The Heat reddens the tissue and the Dampness keeps it soft and heavy, so the fold cannot dry out until both are cleared and drained.
How the formula is built
The formula is cooling and draining throughout. The clearing herbs deal with the Heat, the draining herbs remove the Dampness through the urine, and the Blood-cooling herbs address the inflammation at the surface. That is why it suits the hot damp pattern.
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 divided doses.
Modifications
- If the itching is severe, itch-relieving herbs are added.
- If the Heat is marked, cooling herbs are increased.
- If the Dampness dominates, draining herbs are increased.
- If the pattern is cold and pale, this formula is not used.
Timing
Taken warm in two divided doses.
Duration
One to two weeks, reassessed.
Diet while taking it
Avoid alcohol, greasy sweet food and cold raw food.
Safety
Contraindications
Avoid in cold damp patterns with pale watery discharge and a white coat. Persistent discharge or itching needs medical diagnosis.
Interactions
The draining herbs can add to diuretics. Mu Tong-type herbs must come from safe species.
Pregnancy
Use with caution in pregnancy because Mu Dan Pi and Chi Shao move Blood.
Breastfeeding
Use only under professional guidance.
Children
Used only with professional supervision.
Before you use it
Recorded from the classical record and rewritten in this project's own words. Educational only: not a prescription, and persistent discharge or genital itch needs medical diagnosis.
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
Recorded in the classical gynaecological literature for Damp-Heat discharge.
Zhi Dai Fang comes from the classical gynaecological literature, where Damp-Heat discharge was a standard diagnosis. Its draining approach is applied in practice to the itchy damp-heat skin of the same region, which is why it appears in this database.
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?
Yellow thick malodorous discharge with itch and Damp-Heat signs, and the itchy damp skin of the same region.
How is it different from Er Miao San?
Er Miao San is a two-herb formula for lower-body Damp-Heat. Zhi Dai Fang is fuller and aimed at discharge and itching.
Should persistent discharge be assessed?
Yes. Persistent discharge or itching needs medical diagnosis before herbal treatment.
How long is it used?
One to two weeks, reassessed.