Alum and alum for the same substance of different names, for the sulfate mineral alum stone by processing and refining. Alum is cold in nature, sour in taste, astringent, belonging to the lungs, spleen, liver, large intestine meridian, external use has detoxification and insecticide, dry dampness to stop itching (through the treatment of dry dampness to stop itching) effect; internal use has diarrhea, stopping bleeding, expectoration of wind to remove the effect of phlegm. Clinically, alum is often used in the treatment of itchy skin, sores, mouth sores, nose redness and swelling, pus in the ear, wet and itchy pubic area, leucorrhoea (abnormal leucorrhoea with blood or blood clots), blood in the stool, bleeding (excessive menstruation or more than a few drops of blood), bleeding from wounds, diarrhea and abdominal pain, epilepsy, and other conditions. The adverse reactions and contraindications of this product are not clear. After the occurrence of discomfort should consult a doctor in time, under the guidance of physician’s diagnosis and selection of medication, do not self-medication, so as not to delay the condition.