What Juan Bi Tang is for
This formula treats tissue that has become tight, numb and weather-sensitive over stiff joints. It disperses the Wind-Cold-Dampness that has lodged in the channels and at the same time supplies the Qi and Blood that the depleted channels lack, so the skin is opened and supported rather than stripped. It is unusual among obstruction formulas because it tonifies as it disperses.
The skin over the affected joints and muscles looks pale and slightly thin, and it will not stretch: the tissue feels tight, bound and heavy, as if it were a size too small. Patches go numb or prickle, the surface is cold to the touch, and the tightness deepens on cold damp days. There is no redness, no heat and no swelling of the hot kind. The pattern is Wind-Cold-Dampness lodged in the channels on thin Qi and Blood, so the tissue is obstructed and undernourished at once.
Qiang Huo and Fang Feng open the channels and disperse the Wind-Cold-Dampness, Jiang Huang moves the Blood and warms the shoulders and arms so the obstruction breaks, and Huang Qi with Dang Gui supplies the Qi and Blood that the channels have been lacking. Bai Shao softens the sinews and the tight tissue over them, and Gan Cao harmonises. Because the formula disperses and supports at the same time, it can be continued where a purely dispersing formula would leave the skin more depleted.
It suits the cold, damp, deficient type: pale tight tissue with numbness, worse in cold weather, on a thin depleted base. Where the joints are red, hot and swollen, the pattern is Damp-Heat and this formula would make it worse. New or progressive weakness, or skin that is tightening quickly, needs medical assessment alongside treatment, because tight tissue can reflect a condition that needs its own management.
Actions
- Dispels Wind-Dampness
- Tonifies Qi and harmonises the channels
- Nourishes Blood and softens the sinews
- Relieves pain, stiffness and numbness
Properties
- Taste and temperature: Predominantly acrid and sweet with mild bitterness. Acrid disperses Wind-Cold-Damp from the channels, sweet tonifies Qi and Blood to support the body's ability to clear it.
- Organs: Liver, Spleen, Lungs
- Channels: Liver, Spleen, Lung, Large Intestine
The pattern behind it
The pattern is obstruction on a base of deficiency. Wind-Cold-Dampness lodged in the channels produces the pain, stiffness and weather sensitivity, while the lack of Qi and Blood means the body cannot clear it and the channels are poorly nourished. The formula disperses the pathogen and rebuilds the support at the same time.
Composition
The herbs in Juan Bi Tang, with their role and dose.
| Role | Herb | Dose | Properties | Why it is there |
|---|---|---|---|---|
| King | Qiang Huo | 9 g | Warm, Pungent, bitter | Disperses Wind-Cold-Dampness, particularly in the upper body and neck. |
| King | Fang Feng | 9 g | Slightly warm, Pungent, sweet | The standard Wind herb, used for migrating pain and weather sensitivity. |
| Huang Qi | 9 g | Slightly warm, Sweet | Tonifies Qi and supports the body's ability to move the pathogen out. | |
| Dang Gui | 9 g | Warm, Sweet, pungent | Nourishes and moves Blood, so the channels are supplied while being cleared. | |
| Assistant | Bai Shao | 9 g | Slightly cold, Bitter, sour | Nourishes Blood and softens the sinews, easing stiffness and cramping. |
| Envoy | Jiang Huang | 9 g | Warm, Pungent, bitter | Warms and moves Blood, reaching the shoulders and arms and relieving pain. |
| Gan Cao | 3 g | Neutral, Sweet | Harmonises the formula and supports the middle. |
Patterns it treats
Painful Obstruction with Wind-Cold-Damp
Pale, tight, weather-sensitive tissue over stiff joints, with patches of numbness and a bound quality that deepens on cold damp days. The pattern is Wind-Cold-Dampness in the channels on thin Qi and Blood, so the tissue is obstructed and undernourished at once.
How the formula is built
Two dispersing herbs open the channels and clear Wind-Cold-Dampness, Jiang Huang warms and moves the Blood so the obstruction breaks, and Huang Qi with Dang Gui and Bai Shao supply the Qi and Blood that the channels need. That balance is why it works in chronic obstruction, where dispersing alone would exhaust the person and tonifying alone would leave the pathogen in place.
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 Cold dominates, warming herbs and moxibustion are added.
- If the upper body dominates, the upper-body dispersing herbs are increased.
- If the deficiency dominates, the tonics are increased.
- If Heat appears, the warming herbs are reduced and cooling ones added.
Timing
Taken warm in two divided doses.
Duration
Four to eight weeks as an initial course for chronic obstruction, then reassessed; two to four weeks for subacute flares.
Diet while taking it
Warm cooked food; avoid cold and raw food while the joints are stiff and painful.
Safety
Contraindications
Avoid in Damp-Heat or Wind-Heat obstruction: red, hot, swollen joints with heat signs would be made worse by the warming herbs. Avoid in acute inflammation of the joints.
Interactions
The Blood-moving herbs may add to anticoagulant and antiplatelet medication. Huang Qi may affect blood sugar and immune function, so coordination is needed in diabetes or on immunosuppressants.
Pregnancy
Use with caution in pregnancy. Jiang Huang activates Blood circulation and is traditionally treated with care in pregnancy.
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 progressive weakness or new severe joint pain 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
Yang Shi Jia Cang Fang (杨氏家藏方, The Yang Family's Collected Formulas) by Yang Ti, Song dynasty, 1178.
The formula comes from the Yang family formulary of 1178, one of the Song dynasty collections that systematised the treatment of painful obstruction. Its distinctive feature is that it tonifies while dispersing, which made it suitable for the chronic patient rather than only for the acute attack, and that is why it still fits the weather-sensitive pain of older or depleted people.
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 tonics?
Because chronic obstruction depletes the person, and a depleted body cannot clear the pathogen. The tonics supply the Qi and Blood the channels need while the dispersing herbs clear them.
Is it suitable for hot swollen joints?
No. Red, hot, swollen joints are Damp-Heat, and the warming herbs in this formula would worsen that.
Can it help numbness?
Yes, where the numbness comes from poorly nourished channels on a deficient base. Numbness from nerve compression or neurological disease needs medical assessment.
How long is it used?
Four to eight weeks as an initial course for chronic obstruction, then reassessed.