Pu Ji Xiao Du Yin

What Pu Ji Xiao Du Yin is for

This formula is famous in the tradition for a single striking skin picture: hot, red, tight swelling that blooms across the head and face. Its structure is unusual, because strong clearing herbs are paired with herbs that carry that clearing up to the head and out to the surface.

The skin is the whole story here. Angry red patches rise on the face, the ears, the neck or the scalp, feel hot and tight to the touch, and are tender enough that the person holds the head still. The border is often sharp against ordinary skin, the centre can turn dusky, and the swelling spreads over hours rather than weeks. Where the tissue is loose, the swelling is most obvious. This is the picture of toxic Heat gathered where the Yang channels rise, and the same process that makes the surface so hot and red is what makes the swelling climb.

The herbs work directly on that surface picture. Huang Lian and Huang Qin clear the Heat and resolve the toxicity that drives the redness, so the cause is addressed rather than only the skin. Niu Bang Zi, Bo He, Jiang Can, Ma Bo and Ban Lan Gen disperse the region and vent the pathogen outward, which is what takes the tension out of the swelling. Xuan Shen cools the Blood and softens the hard swelling, so the tissue stops feeling board-like. Jie Geng guides the clearing upward, Chen Pi keeps the cold herbs from congesting the middle, and Chai Hu with Sheng Ma lift the whole action to the head, with Gan Cao harmonising the group.

That lifting action is the signature of the formula. Chai Hu and Sheng Ma carry the cooling upward, so the herbs act where the lesions are rather than being spent elsewhere, and they help push the pathogen out through the surface. This is why the formula is used for lesions above the neck and not for swollen tissue lower down. It is an acute formula, used for days rather than weeks. A pale, cold, unyielding swelling is a different picture and is not treated this way, and spreading facial redness with fever needs urgent medical care.

Actions

• Clears Heat and resolves toxicity
• Disperses swelling of the head and face
• Cools the Blood
• Benefits the throat and vents the pathogen outward

Properties

• Taste and temperature: Predominantly bitter and pungent with a sweet note. Bitter clears Heat and resolves toxicity, pungent disperses and lifts, sweet protects the Stomach.
• Organs: Lungs, Stomach, Heart, Liver
• Channels: Lung, Stomach, Heart

The pattern behind it

The pattern is epidemic toxic Heat concentrated above the neck. The Heat and toxicity produce the swelling and redness, and because the region is high, the treatment must both clear and lift. The formula clears the toxicity and uses lifting herbs to bring that action to the head and disperse it outward.

Composition

The herbs in Pu Ji Xiao Du Yin, with their role and dose.

Patterns it treats

How the formula is built

The formula clears strongly and lifts deliberately. The cooling herbs deal with the toxicity, while Chai Hu and Sheng Ma carry the action to the head and disperse it outward, which is what makes it regional rather than general. Chen Pi and Gan Cao protect the middle from all that coldness.

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 swelling is hard, dispersing herbs are increased.
• If the throat is very sore, throat herbs are increased.
• If constipation is present, a draining herb is added.
• If the lesion spreads or the fever is high, medical care is required.

Timing

Taken warm in two or three divided doses.

Duration

Acute use only: three to seven days, reassessed daily.

Diet while taking it

Light cooling food; avoid alcohol, fried and hot spicy food.

Safety

Interactions

The formula is strongly cooling and may interact with medication for infection; any infection being treated with antibiotics needs medical coordination.

Pregnancy

Use with caution in pregnancy. Niu Bang Zi has a slippery, downward quality, and the strong clearing herbs require professional guidance.

Breastfeeding

Use only under professional guidance.

Children

Used in children with reduced dose for acute head and face swelling, with medical assessment.

Before you use it

Recorded from the classical record and rewritten in this project's own words. Educational only: not a prescription, and spreading facial infection with fever needs urgent medical care.

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

Dong Yuan Shi Xiao Fang (东垣试效方, Li Dongyuan's Tested Formulas), Jin dynasty, 13th century, associated with Li Dongyuan.

The formula is associated with Li Dongyuan and an epidemic of head and face swelling in the Jin dynasty. Its design, strong clearing paired with lifting herbs, became a model for treating the upper body, and it remains the reference formula for acute toxic swelling above the neck.

Classical record

Related formulas

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.