Potassium permanganate itself does not promote wound healing. The main function of potassium permanganate is to make local tissue astringent and stop bleeding, thus indirectly healing the tissue and reducing the possibility of bacterial infection. In clinical practice, the use of potassium permanganate is usually used for rectal and anal canal diseases, such as hemorrhoids, anal fissures or anal fistulas after local surgery, and when there is no surgery, 1:5000 potassium permanganate is usually used, that is, potassium permanganate is prepared into a 1:5000 solution or diluted into 5000 times of potassium permanganate solution, so that the patient can take a sitz bath and completely relax the entire rectum and anus, so that the potassium permanganate The diluted solution fully touches the rectum and anal canal mucosa, thus sterilizing, astringent and hemostatic, which indirectly promotes the purpose of wound healing. Therefore, potassium permanganate itself does not directly promote wound healing, but indirectly promotes tissue healing and reduces bacterial infection through sterilization as well as astringency and hemostasis.