What Lian Po Yin is for
This formula is used when the skin flares at the same time as a Damp-Heat episode in the middle. It clears the Heat, dries the Dampness and settles the Stomach, so greasy congested follicles and small pustules calm down while the acute phase passes. It is a short course, for days rather than weeks, and it is not a drying treatment for ordinary dry skin.
The skin is oily and congested, with follicles that look blocked and dull, small pustules around the hairline, the jaw, the chest and the folds of the body, and patches that weep or crust where the Dampness is heaviest. The tissue feels clammy, the shine returns quickly after washing, and the lesions are red-based but not deeply inflamed. The pattern is Damp-Heat in the middle, so the skin turns greasy and eruptive while the Heat keeps the bases red.
Huang Lian and Zhi Zi clear the Heat that reddens the lesions, Hou Po, Ban Xia and Shi Chang Pu dry the Dampness and move the Qi so the greasy congestion clears, and a large dose of Lu Gen protects the fluids that so much drying would otherwise consume. Dan Dou Chi releases any remaining surface component, so an eruption that is still coming out is not driven inward. The balance is the point: the formula dries the skin and the middle without leaving either parched.
It is for the acute hot, humid phase, used for days rather than weeks. Cold-Damp is the opposite picture and is excluded: skin that is pale, cold and waterlogged, with clear weeping rather than greasy pustules, would be made worse by the drying herbs. It is also not a long-term treatment for dry skin or for chronic low-grade acne with no heat in it.
Actions
- Clears Heat and dries Dampness
- Settles the Stomach and stops vomiting
- Moves Qi and relieves fullness
- Protects fluids while drying
Properties
- Taste and temperature: Predominantly bitter and pungent with a sweet note. Bitter clears Heat and dries, pungent moves Qi of the middle, sweet protects fluids.
- Organs: Spleen, Stomach, Large Intestine
- Channels: Spleen, Stomach
The pattern behind it
The pattern is Damp-Heat obstructing the middle. Dampness produces the fullness, greasy coat and heaviness; Heat produces the thirst, bitter taste and rapid pulse. Together they disturb the Stomach's normal descent, which is why nausea and vomiting appear. The formula clears the Heat, dries the Dampness and restores the descent.
Composition
The herbs in Lian Po Yin, with their role and dose.
| Role | Herb | Dose | Properties | Why it is there |
|---|---|---|---|---|
| Huang Lian | 3 g | Cold, Bitter | Clears Heat and dries Dampness in the middle, addressing the source of the disturbance. | |
| King | Hou Po | 6 g | Warm, Bitter, pungent | Moves Qi, dries Dampness and relieves the fullness in the middle. |
| Zhi Zi | 9 g | Cold, Bitter | Clears Heat and drains it downward, addressing the restlessness and the Heat. | |
| Dan Dou Chi | 9 g | Cool, Sweet, pungent | Releases any remaining surface pathogen and helps the formula disperse. | |
| King | Shi Chang Pu | 3 g | Warm, Pungent | Transforms turbid Dampness and opens the orifices, clearing the heavy head. |
| King | Ban Xia | 3 g | Warm, Pungent | Dries Dampness and lowers rebellious Stomach Qi, directly addressing the nausea. |
| Lu Gen | 60 g | Cold, Sweet | In a large dose it clears Heat and generates fluids, protecting the body from the drying herbs. |
Patterns it treats
Damp-Heat invading the Spleen
Oily, congested skin with blocked follicles and small red-based pustules, worst in the folds and around the hairline, with a clammy shine that returns quickly. The pattern is Damp-Heat in the middle, so the skin turns greasy and eruptive rather than dry or cold.
How the formula is built
The formula balances drying with protection. Ban Xia, Hou Po and Shi Chang Pu dry Dampness and move the middle; Huang Lian and Zhi Zi clear the Heat; and the large dose of Lu Gen protects the fluids that all that drying would otherwise consume. Dan Dou Chi releases any remaining surface component, which is why it is also used for early summer-heat with digestive upset.
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 vomiting dominates, herbs that lower rebellious Qi are increased.
- If diarrhoea dominates, drying herbs are increased and fluids protected.
- If the head is heavy, aromatic opening herbs are increased.
- If Cold signs appear, cooling is reduced - the white coat is the signal.
Timing
Taken in two or three divided doses.
Duration
Acute use only: three to seven days, and reassessed if symptoms have not improved within three days.
Diet while taking it
Light diet; avoid greasy, fried, sweet and cold food, and alcohol.
Safety
Contraindications
Avoid in Cold-Damp patterns: this formula is designed to clear Heat and dry Dampness, and would worsen cold, watery diarrhoea with a white coat. Use only for the acute phase.
Interactions
The draining and drying herbs can affect fluid balance and add to diuretic medication. Berberine from Huang Lian can affect drug metabolism.
Pregnancy
Use with caution in pregnancy. Ban Xia is traditionally classified as a pregnancy-caution herb, and the bitter cooling herbs need professional guidance.
Breastfeeding
Use only under professional guidance.
Children
Used in children with reduced dose for damp-heat digestive upset.
Before you use it
Recorded from the classical record and rewritten in this project's own words. Educational only: not a prescription, and persistent vomiting or diarrhoea 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
Wen Bing Tiao Bian (温病条辨, Systematic Differentiation of Warm Diseases) by Wu Jutong, Qing dynasty, 1798.
Wu Jutong recorded Lian Po Yin in his 1798 treatise for Damp-Heat obstructing the middle, with the nausea and heaviness that hot humid weather produces. Because the same pattern affects the skin, it is also used where greasy or follicular skin problems flare alongside the digestive disturbance.
Classical record
The formula verse runs: Lian Po Yin uses fragrant fermented soybean, acorus and pinellia, with a large dose of reed rhizome to clear Heat and protect the fluids.
Wen Bing Tiao Bian (温病条辨, Systematic Differentiation of Warm Diseases), Wu Jutong, Qing 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
Why does it contain both warming and cooling herbs?
Because Dampness needs drying, which is often warm and aromatic, while Heat needs cooling. The formula balances the two, and the bitter cooling herbs stop the warming ones from adding to the Heat.
Is it suitable for cold-type diarrhoea?
No. Cold-Damp with watery stools, cold limbs and a white tongue coat needs warming herbs instead.
How long is it used?
Three to seven days, reassessed if there is no improvement after three.
Why such a large dose of Lu Gen?
Because the formula is drying. The large dose of a cooling, fluid-generating herb protects the body from that dryness while still clearing the Heat.