Alum is a kind of goldstone herbal medicine, scientifically known as potassium aluminum sulfate dodecahydrate, which is toxic.1. In Chinese medicine, the role of alum is to astringent and astringent, detoxify and remove heat. Clinical efficacy can be applied to antibacterial, for diarrhea as well as infection. 2. Alum can treat excessive leucorrhea, ulcers and vulvar infections in women, such as trichomonas vaginalis. 3. Alum can also have certain effects on the gallbladder, such as promoting bile secretion. Because alum is toxic, so pay attention to the time and dosage when applying it.