0.1g of potassium permanganate needs to be proportioned as follows: dissolve 0.1g of potassium permanganate in 500ml of water to give a concentration of 1:5000. Potassium permanganate has a disinfecting and sterilizing effect, when applying this drug, it needs to be rationed to a certain concentration, usually the concentration of potassium permanganate is 1:5000, so if it is 0.1g of potassium permanganate, it needs to be diluted into 500ml of water. If the concentration is too high, it will damage the skin or mucous membranes, and if the concentration is too low, it will not be able to play an effective role in sterilization and disinfection. Potassium permanganate can be used in sitz baths, which can keep the perineum clean, and when applying this drug, it needs to be applied under the guidance of a doctor.