Palm-Bark Powder，*Chen Su’an’s Supplementary Explanations on Gynecology*, Volume 1.，A woman’s menstrual period typically lasts 6–7 days at most and 4–5 days at least, after which the Blood Sea naturally clears. If it persists for half a month or even a month, with spotting that still does not cease, the cause is either an internal deficiency of the Chong and Ren meridians, where qi is unable to contain the blood, or an external invasion of wind-cold, causing blood stagnation in the meridians. Consequently, the spotting continues unceasingly; if prolonged, it develops into menstrual leakage, leading to consumptive disease or hematuria. If sexual intercourse occurs during menstruation, it may result in blood leakage.
Palm-Bark Powder
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Formulas Name : Palm-Bark Powder
Chinese Name : 棕榈散
Drug Formulation
2 qian of palm bark, 2 qian of cattail pollen (both stir-fried until black while retaining their properties), Angelica sinensis root (stir-fried with wine), white peony root (stir-fried), Ligusticum chuanxiong, raw rehmannia root, Scutellaria baicalensis, Moutan bark, Gentiana macrophylla, Eupatorium fortunei, and Eucommia ulmoides.
Source
*Chen Su’an’s Supplementary Explanations on Gynecology*, Volume 1.
Benefits
A woman’s menstrual period typically lasts 6–7 days at most and 4–5 days at least, after which the Blood Sea naturally clears. If it persists for half a month or even a month, with spotting that still does not cease, the cause is either an internal deficiency of the Chong and Ren meridians, where qi is unable to contain the blood, or an external invasion of wind-cold, causing blood stagnation in the meridians. Consequently, the spotting continues unceasingly; if prolonged, it develops into menstrual leakage, leading to consumptive disease or hematuria. If sexual intercourse occurs during menstruation, it may result in blood leakage.
Copyright: Excerpt from *Chen Su’an’s Supplementary Explanations on Gynecology*, Volume 1., Copyright belongs to the Original Author and all original sources, This article was shared by DeDe on August 31, 2026, Please credit the source and include a link to the original article when reposting.
Terminology Proofreading: [Cheng Bo] | August 31, 2026 Reviewed by: [Wang Zhongxiang, Associate Chief TCM Physician (China)] | August 31, 2026
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Palm-Bark Powder,A woman’s menstrual period typically lasts 6–7 days at most and 4–5 days at least, after which the Blood Sea naturally clears. If it persists for half a month or even a month, with spotting that still does not cease, the cause is either an internal deficiency of the Chong and Ren meridians, where qi is unable to contain the blood, or an external invasion of wind-cold, causing blood stagnation in the meridians. Consequently, the spotting continues unceasingly; if prolonged, it develops into menstrual leakage, leading to consumptive disease or hematuria. If sexual intercourse occurs during menstruation, it may result in blood leakage.