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The dried pith of Juncus effusus (Juncaceae). Enters the Heart, Lung, and Small Intestine channels. Light in substance and thin in qi, it excels at clearing Heart fire and disinhibiting urination, a key herb for mouth sores and vexation from flaring Heart fire.
Reference range for non-pregnant adults. Not a personalized prescription. Pregnancy, lactation, and pediatric use require specialist supervision.
Protective guidance only — when to avoid or use with caution. This block deliberately omits pregnancy, lactation, and pediatric dosing: any such use must be managed by a qualified TCM practitioner or appropriate specialist.
（时珍曰）灯心草降心火，止血通气，散肿止渴。烧灰入轻粉少许，吹喉治急喉痹甚捷。
草部
@misc{bencaodian-deng-xin-cao,
author = {{Bencaodian Editorial}},
title = {Dēng Xīn Cǎo 灯心草 (Rush Pith) — Junci Medulla},
year = {2026},
howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine},
url = {https://bencaodian.org/en/herbs/deng-xin-cao},
urldate = {2026-04-17},
note = {CC BY-SA 4.0}
}© Bencaodian Editorial · Licensed under CC BY-SA 4.0
灯心草含木犀草素类黄酮和菲类化合物，具利尿、镇静、抗菌和抗氧化作用。
Deng Xin Cao contains luteolin-type flavonoids and phenanthrene derivatives with diuretic, sedative, antibacterial, and antioxidant effects.
灯心草甘淡微寒，利尿通淋，清心降火，为心烦失眠夜啼常用药。
Sweet-bland and slightly cold; promotes urination and clears heart fire; used for irritability, insomnia, and pediatric night-crying.
This section is provided for academic reference only and does not constitute medical advice.