Potassium permanganate is often used clinically to clean and soak infected wounds and wounds because of its disinfectant and antiseptic properties. Before using potassium permanganate, it must be diluted. In clinical practice, potassium permanganate is usually diluted in a 1:5000 solution, which means that 500 ml of water should be added to one piece of potassium permanganate, and the water should be lukewarm, not diluted with boiling water. If the concentration is too high, it may damage the skin and mucous membranes of the body, and prolonged use will stain the skin, but it will gradually disappear after discontinuing use. If there is an obvious burning sensation or redness at the site of the drug, it is recommended to stop using it immediately and clean the local drug, and if necessary, it is recommended to seek medical attention.