Potassium permanganate is a small purple-red pill that is an oxidizing agent that kills bacteria, fungi and spores, etc. When preparing potassium permanganate liquid in general, it needs to be prepared in a ratio of 1:5000. It is usually a piece of potassium permanganate, completely dissolved in 5000mL of warm water, the color of the water is pink or light red. If the concentration of the preparation is too high, it is generally purplish red. Because potassium permanganate burns the skin, it can cause skin pain if the concentration is too high later. The potassium permanganate sitz bath is a complete immersion of the perineum in the liquid, making sure to keep the wound completely in the liquid for about 10-15 minutes. Soak twice a day, that is, once in the morning and once in the evening. If after defecation, because the perineum is dirty, you need to take another sitz bath temporarily.