Potassium permanganate is available over the counter, but it is usually made into tablets or powder and dissolved into a solution before use. Potassium permanganate belongs to category A OTC drugs and has a red OTC symbol on the package. According to the national drug regulations, Class A OTC drugs can only be retailed in social pharmacies and pharmacies of medical institutions that are equipped with licensed pharmacists or pharmacists above the level of technicians with the Drug Operation License, and must be purchased and used under the guidance of licensed pharmacists or pharmacists in pharmacies. Potassium permanganate can be purchased in general pharmacies and hospital pharmacies. Potassium permanganate as a strong oxidizing agent, can kill bacteria, commonly used in gynecological inflammation sitz bath and vaginal douche, can also be used to wash the vulva, to prevent urinary tract infections, but also can be used for hemorrhoids, to play the role of relieving itching and pain, to prevent infection, and to promote the role of dislodged hemorrhoidal nucleus reset. This product is crystalline and highly concentrated solution is corrosive, even if it is a dilute solution sometimes repeated use can cause corrosive burns. Adverse effects of oral administration include nausea, vomiting, corrosive edema, browning of the oral mucosa, and even hepatic and renal damage and cardiovascular function inhibition, circulatory failure and n-ferrohemoglobinuria. It should be noted that all medicinal solutions need to be freshly prepared, with different concentrations for different indications, and need to be strictly controlled by the concentration of the medication is too thick, the solution will damage the skin, irritation, and make the skin, fingernails (toes) coloring, but also make the clothes stained. It should be purchased and used under the guidance of a physician.