Stemona tincture is mainly used to treat pruritic skin diseases, such as head lice, pubic lice, body lice, scabies or scabies. It belongs to an external lotion, which is usually made of Stemona Stemona 4g and 75% ethanol. Tincture refers to dissolving it out with specified concentration of ethanol, or making it into a clear liquid, and then it can be used for oral administration or external use. Like Stemona tincture, it is usually used externally to scrub itchy skin. Generally speaking, Stemona has little toxicity, but as a lotion, the toxicity will rarely enter the blood. Stemona plays a role mainly in its various alkaloids. It is mainly found in vitro experiments that Stemona tincture can eliminate staphylococcus, streptococcus, diphtheria and other types of groups, and it can inhibit skin fungi to a certain extent and play a certain role in stopping itching. If it is not taken orally, the side effects of external application alone on the body are extremely small.