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 Introduction To White Mustard Seed (bai jie zi)









White Mustard Seed (bai jie zi)

Semen Sinapis Albae

Properties: It is acrid in flavour and warm in nature. It acts on the lung channel. Its warmness can resolve phlegm and acridness can disperse and promote the flow of Qi. It is wandering about in nature, so it can clear obstructions in the channels to relieve pain, subside swelling and congestion, hence it is indicated in treatment of obstructing functional activities of Qi by phlegm, cough, asthma, chest tightness or obstruction of the channels by phlegm, numbness and pain in joints and extremities.

Effects: Resolving phlegm and promoting the circulation of Qi, subsiding swelling and congestion.


1. For treatment of internal accumulation of phlegm-dampness, obstruction of functional activities of Qi by phlegm, cough with abundant expectoration, chest tightness and anorexia, it is usually combined with Fructus perillae, semen Raphani in order to resolving phlegm and reliving fullness: For treatment of fluid :Cretention in chest and hypochondrium , asthma, fullness and pain in hypochondrium, it can be used in combination with Radix Euphorbiae Kansui, Radix Euphorbiae Pekinensis, and other phlegm-removing and water retention dispelling drugs.

2.  For treatment of numbness and pain of joints and extremities due to obstruction in channels by phlegm-dampness, it is usually used together with Myrrha, Cortex Cinnamomi, Radix Aucklandiae, and other drugs having the effects of resolving phlegm and clcaring congestion and obstruction in the channels, to relieve pain; For treatment of cold abscess and mycotic lesion or abscess due to cold of insufficiency type in both blood and Qi systems, it is frequently used together with Herba Ephedrae, Cortex Cinnamomi, Colla Cornus Cervi, Radix Rehmanniae Praeparata, and other drugs in order to warm Yang and enrich the blood, clear phlegm and stagnancy, such as Yanghe Tang.

Dosage and Administration: 3-10g for making decoction. Suitable amount for external application.

Precautions: Contraindicated in hypersensitive skin when used externally.

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