Potassium permanganate itself does not promote wound healing, the main function of potassium permanganate is to make the local tissues astringent, hemostasis, so as to achieve the purpose of indirectly making the tissue healing, and reduce the possibility of bacterial infection. In the clinic for the use of potassium permanganate is generally used for rectal, anal canal diseases, such as hemorrhoids, anal fissure or anal fistula after local surgery, no surgery, usually using 1:5000 potassium permanganate, that is, potassium permanganate formulated into a 1:5000 solution or diluted into 5000 times the potassium permanganate solution, let the patient sit in the bath, the whole rectum, the anus is completely relaxed, so that potassium permanganate The diluted solution can fully contact the mucous membrane of rectum and anal canal, thus sterilizing, astringent, hemostatic, and indirectly promoting 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.