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HerbPolygoni Avicularis Herba

萹蓄

Biǎn Xù

Knotgrass

利水渗湿药苦bitter

The dried aerial parts of Polygonum aviculare (Polygonaceae). Enters the Bladder channel. Bitter and downward-draining, it disinhibits urination and frees strangury while also killing parasites and relieving itching. Often paired with qu mai for heat strangury.

Actions · 功效

利尿通淋Disinhibit urination and free strangury
杀虫止痒Kill parasites and relieve itching
清膀胱湿热Clear damp-heat from the Bladder

Indications · 主治

热淋涩痛Heat strangury with painful inhibited urination
小便短赤Scanty dark urination
蛲虫病，阴部湿痒Pinworm infection, genital dampness with itching

Dosage · 用量

Per day · decoction · non-pregnant adult

9–15 g

Reference range for non-pregnant adults. Not a personalized prescription. Pregnancy, lactation, and pediatric use require specialist supervision.

Draft

Footnotes · 引用

[1]Shennong Bencao Jing (Divine Husbandman's Materia Medica)
[2]Mingyi Bielu (Supplementary Records of Famous Physicians)

Permalink · CC BY-SA 4.0

Cite this entry

@misc{bencaodian-bian-xu,
  author       = {{Bencaodian Editorial}},
  title        = {Biǎn Xù 萹蓄 (Knotgrass) — Polygoni Avicularis Herba},
  year         = {2026},
  howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine},
  url          = {https://bencaodian.org/en/herbs/bian-xu},
  urldate      = {2026-04-16},
  note         = {CC BY-SA 4.0}
}

Permalink is fixed

@misc{bencaodian-bian-xu, author = {{Bencaodian Editorial}}, title = {Biǎn Xù 萹蓄 (Knotgrass) — Polygoni Avicularis Herba}, year = {2026}, howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine}, url = {https://bencaodian.org/en/herbs/bian-xu}, urldate = {2026-04-16}, note = {CC BY-SA 4.0} }