Potassium permanganate powder is to be used externally at a concentration of 1:4000 for acute dermatitis and 1:5000 as a gastric lavage solution for acute dermatitis, armpit odor, etc. It is contraindicated in pregnant or lactating women. Adverse reactions are corrosive burns. 1. When acute dermatitis or acute eczema with secondary infection, dissolve in 1:4000 concentration for wet application. Flush ulcers or abscesses as 1:1000 concentration. 2. As a gastric lavage solution at a concentration of 1:5000, and in the treatment of snakebite at a concentration of 1:1000. Potassium permanganate can be used to clean ulcers or abscesses in acute eczema or acute dermatitis; it can also be used in the first aid treatment of snakebite; it can also be used for gastric lavage in the case of poisoning by strychnine, morphine opioids, or organic poisons. It is contraindicated in pregnant or breastfeeding women. Potassium permanganate is mainly corrosive burns, high concentration of potassium permanganate solution is corrosive, sometimes repeated use of dilute solution can also cause corrosive burns. Patients should not use the medicine by themselves, and should go to the hospital in time, and standardize the treatment under the guidance of the doctor.