Japanese Dock Root

Traditional Use

Primary Actions

• Clears heat and relieves toxic skin lesions ... Yang Ti Gen is used topically or internally for tinea-like eruptions, boils, itchy damp lesions, and inflamed skin disorders.
• Cools blood and reduces swelling ... the root is chosen when heat and irritation are obvious in sores, nodules, or inflamed tissue rather than when dryness or deficiency dominate.
• Moves the bowels in heat patterns ... its bitter descending nature gives it a stronger opening and draining profile than the edible dock image might suggest.

Secondary Actions

• This page should stay on Rumex japonicus root and not collapse into generic dock, rhubarb, or knotweed-like blood-cooling assumptions.
• Fresh root juice and topical vinegar-rub style use are historically important and fit the plant's skin-focused identity better than inflated claims of deep classical formula centrality.

Classic Formulas

• Yang Ti Gen San ... topical damp-itch and tinea-style skin logic.
• Luo Li San type pairings ... a traditional handbook lane for nodular or scrofula-like swelling.
• Fresh-root or vinegar-rub applications ... practical folk use for stubborn parasitic or damp skin eruptions.

Classical References

• Classical and handbook-style usage emphasizes fresh or juiced root on skin disease at least as much as internal decoction use.
• Its bitter cold descending profile explains why constipation and toxic skin patterns sit closer to the center of use than tonic or nourishing claims.