Chinese herbs such as Chuanwu, Caowu, and Psoralea are all aconite products, all of which are pungent, hot and highly toxic. They can be concocted and taken internally, or applied externally with the raw product, which is much more toxic. The toxic substance in aconite is mainly aconitine, which may be absorbed by broken skin, resulting in nausea and vomiting, shortness of breath, drop in blood pressure and other toxic reactions, which may lead to death in serious cases. Therefore, aconite external application must pay attention to the appropriate amount, do not overdose; and can not be used with the mother of pearl, piper betel, half-summer, Ampelopsis, Bletilla, etc.; pregnant women should be avoided. If you need to use aconite products for external application, it is recommended that a professional Chinese medicine practitioner for identification before use, do not use the drug arbitrarily, so as not to cause serious consequences.