What Qing Wen Bai Du Yin is for
This is the largest of the cooling formulas, and it is used for one of the most serious skin pictures in the tradition: a spreading rash or purpuric spots during a severe febrile illness. It is a hospital formula, not a skin treatment.
The eruption is the centre of the picture. A rash spreads and darkens, purpuric spots appear where the Blood has been damaged, and the colour of the skin runs deep red to dusky rather than bright. The surface is hot and dry, the tongue is deep crimson and dry or bare, and the eruption dominates the presentation. This is not the flush of surface Heat: the colour is deep and the spots are fixed, which is how the tradition reads that the Heat has reached the Blood.
The formula clears at every level at once because the picture demands it. Shi Gao in very large doses clears the Qi-level Heat that drives the process behind the rash. Shui Niu Jiao, Sheng Di Huang, Chi Shao and Mu Dan Pi cool the Blood so the spots stop deepening, while Huang Lian, Huang Qin, Zhi Zi and Lian Qiao clear Heat and resolve the toxicity. Zhi Mu, Xuan Shen and Sheng Di Huang protect the Yin that the fever is using up, and Dan Zhu Ye with Jie Geng clear the Heart and open the Lungs.
The doses are outside anything that could be managed at home: Shi Gao reaches 240 g, and the formula belongs to hospital care. It is not for ordinary skin disease, however red, and it is not for chronic or depleted skin, or for cold patterns with pale, cool tissue. Ordinary rashes need far smaller formulas. A spreading rash with high fever, confusion, purpura or bleeding is a medical emergency, and the correct response is urgent medical care rather than herbs.
Actions
- Clears Heat from the Qi level
- Cools the Blood and resolves toxicity
- Nourishes Yin and protects the fluids
- Relieves epidemic toxic rash
Properties
- Taste and temperature: Predominantly bitter, sweet and cold. Bitter clears Heat and resolves toxicity, sweet and cold protect the fluids, with salty Blood-cooling substances.
- Organs: Heart, Lungs, Stomach, Liver
- Channels: Heart, Lung, Stomach, Liver
The pattern behind it
The pattern is epidemic toxic Heat affecting both the Qi and Blood levels. The Heat is severe enough to damage the Blood and produce a rash, and the same Heat threatens the fluids and the spirit. The formula clears both levels at once and protects the Yin, because clearing alone would leave the body depleted.
Composition
The herbs in Qing Wen Bai Du Yin, with their role and dose.
| Role | Herb | Dose | Properties | Why it is there |
|---|---|---|---|---|
| Shi Gao | 60 to 240 g | Cold, Sweet, pungent | Clears Qi-level Heat in very large doses, the main clearing agent for the fever. | |
| King | Shui Niu Jiao | 15 to 30 g | Cold, Salty, cold | The strongest Blood-cooling substance, for the rash and the deep Heat. |
| Sheng Di Huang | 9 to 30 g | Cold, Sweet, bitter | Cools the Blood and nourishes Yin, protecting the fluids. | |
| Huang Lian | 6 to 12 g | Cold, Bitter | Clears Heat and resolves toxicity, particularly of the Heart. | |
| Zhi Mu | 6 to 12 g | Cold, Bitter, sweet | Clears Heat and moistens, protecting the Yin. | |
| Huang Qin | 6 to 9 g | Cold, Bitter | Clears Heat from the upper and middle body. | |
| Zhi Zi | 6 to 9 g | Cold, Bitter | Clears Heat from the three burners and drains it downward. | |
| Chi Shao | 6 to 9 g | Slightly cold, Bitter | Cools and moves the Blood, addressing the rash without leaving stasis. | |
| Mu Dan Pi | 6 to 9 g | Slightly cold, Bitter, pungent | Cools the Blood and clears Heat, supporting the Blood-level action. | |
| Xuan Shen | 6 to 12 g | Cold, Sweet, bitter, salty | Cools the Blood and nourishes Yin, protecting against the depletion the fever causes. | |
| Lian Qiao | 6 to 12 g | Slightly cold, Bitter | Clears Heat and resolves toxicity. | |
| Dan Zhu Ye | 3 to 6 g | Cold, Sweet, bitter | Clears Heat from the Heart and settles restlessness. | |
| Jie Geng | 3 to 6 g | Neutral, Bitter, pungent | Opens the Lung Qi and guides the formula upward. | |
| Gan Cao | 3 to 6 g | Neutral, Sweet | Harmonises the formula and supports the middle. |
Patterns it treats
Heat in the Blood Level
A spreading rash or purpuric spots during a severe febrile illness, deep red to dusky on hot, dry skin, with a deep crimson tongue. The colour is deep and the spots are fixed, which is what marks Heat that has reached the Blood and separated it from a surface rash.
How the formula is built
The formula combines three classical approaches: the Qi-level clearing of Shi Gao, the Blood-level cooling of Shui Niu Jiao and the four-substance cooling group, and the Yin protection of Sheng Di Huang, Zhi Mu and Xuan Shen. That breadth is what makes it a formula for severe epidemic illness rather than for ordinary skin conditions.
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 in divided doses under hospital supervision.
Modifications
- The classical text describes adjustment of the dose according to severity of the Heat signs.
- If the mind is clouding, the formula is escalated and urgent care is required.
- If the fluids are badly damaged, the moistening group is increased.
- If the rash is bleeding, Blood-cooling and hemostatic herbs are increased.
Timing
Given in divided doses under hospital supervision.
Duration
Acute emergency use: one to five days, discontinued or modified as soon as the fever breaks and the critical signs resolve.
Diet while taking it
Cool fluids in small sips if permitted; hospital care decides oral intake.
Safety
Contraindications
Avoid in Yang deficiency patterns. This formula is for severe Heat in a strong or acute presentation, and is not appropriate for chronic or deficient conditions.
Interactions
The very large doses and the cold nature require hospital supervision. Shui Niu Jiao and the Blood-cooling group are used in acute care only.
Pregnancy
Contraindicated in pregnancy. Mu Dan Pi and Chi Shao move Blood, and the extremely cold heavy doses are unsuitable.
Breastfeeding
Contraindicated in breastfeeding without specialist guidance.
Children
Used only in hospital care with specialist dosing.
Before you use it
Recorded from the classical record and rewritten in this project's own words. Educational only, not a prescription. A severe febrile illness with rash, confusion or purpura is a medical emergency.
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
Yi Zhen Yi De (疫疹一得, Gains in Epidemic Rashes) by Yu Shiyu, Qing dynasty, 1794.
Yu Shiyu wrote Yi Zhen Yi De in 1794 after working through epidemics of severe rash illness. His formula combined the strongest cooling methods of the tradition into one prescription, and its scale, with Shi Gao reaching 240 g, shows how far the classical tradition was willing to go in a genuine emergency.
Classical record
Yu Shiyu recorded the formula during epidemics of severe rash illness, combining Qi-level clearing, Blood-level cooling and Yin protection because the Heat affected every level at once.
Yi Zhen Yi De (疫疹一得, Gains in Epidemic Rashes), Yu Shiyu, Qing dynasty, 1794.
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
Is this used for ordinary skin conditions?
No. It is for severe systemic febrile illness with a rash, in hospital care. Ordinary skin conditions need much smaller formulas.
Why is the Shi Gao dose so large?
Because it clears Qi-level Heat, and in severe epidemic illness the Heat is extreme. The classical doses reach 240 g, which is far outside self-treatment.
How is it different from Qing Ying Tang?
Qing Ying Tang cools the nutritive level. This formula adds Qi-level clearing and is used when the Blood level is already involved, with a rash or purpura.
When is it an emergency?
High fever with a rash, confusion, purpura or bleeding is a medical emergency and needs immediate hospital care.