Croton Seeds

Traditional Use

Primary Actions

• Drastically purges cold accumulation - Ba Dou is one of the strongest downward-draining herbs in the materia medica and is reserved for severe cold constipation, food stagnation, and abdominal fullness when ordinary purgatives are too weak.
• Expels retained water and reduces swelling - classical use extends to ascites, edema, and severe distension patterns in which cold accumulation and water retention bind together.
• Drives out phlegm and opens obstructed throat conditions - tiny doses were historically used for stubborn phlegm accumulation, throat blockage, and difficult downward movement of Lung and Stomach Qi.
• Externally corrodes sores and kills parasites - topical preparations were used for scabies, tinea, toxic ulcers, and suppurative lesions when a strong corrosive or drying action was desired.

Secondary Actions

• Ba Dou is a specialist emergency-style herb rather than a routine bowel mover, and classical use depends on minute dosing, processing, and close supervision.
• Traditional practice often distinguishes the raw seed from processed Ba Dou Shuang, which tempers some of the harsh oil while preserving the obstruction-breaking character.

Classic Formulas

• Tiny-dose Ba Dou pill or powder use for cold accumulation constipation - a classical drastic-purgative strategy that emphasizes the seed's forceful downward action and the need for very careful dosing.
• Ba Dou combined with other retained-water herbs in old ascites formulas - historical usage for severe abdominal fullness and edema, now mainly preserved as a cautionary example of high-risk purgation.
• External Ba Dou paste or powder - traditional topical application for scabies, tinea, and stubborn toxic sores when corrosive action was intentionally used.

Classical References

• Traditional materia medica texts describe Ba Dou as acrid, hot, and toxic, entering the Stomach, Large Intestine, and Lung to purge cold accumulation, expel water, and open phlegm obstruction.
• Older references consistently stress that the seed is incompatible with pregnancy and unsuitable for frail or weak patients because its attack on obstruction is extremely forceful.
• The common caution about incompatibility with Qian Niu Zi remains part of the traditional identity of the herb and reinforces how carefully it was classically handled.