Potassium permanganate is an inorganic substance, generally used in drinking water treatment, potassium permanganate is a strong oxidizing agent, is commonly used as a disinfectant and antiseptic drug, with the effect of sterilization and disinfection, both need to be guided to use correctly, to avoid causing adverse effects. 1. Potassium permanganate: an inorganic substance, is a new type of highly efficient and multi-functional non-chlorine green disinfectant, has the efficacy of sterilizing, disinfecting, decolorizing and deodorizing in water, and in the process of disinfecting and purifying the water, it doesn’t produce harmful substances to human body. 2. Potassium permanganate: it has the function of disinfection and sterilization, generally used in the treatment of acute dermatitis or acute eczema, if accompanied by bacterial infection can be taken as a local wet compress, but also can be used to locally rinse a small area of ulcers, the concentration of which is too high may lead to skin mucous membrane damage, and prolonged consumption may also lead to pigmentation, appearing as a coloring of the skin area. The drug should be applied under the guidance of a doctor.