Potassium permanganate is helpful in promoting postpartum perineal wound recovery, keeping the vulva dry and beneficial to wound recovery, but it does not need to be used routinely. Potassium permanganate is recommended to start using it after 1 week after delivery because the endocervical opening has closed around 1 week after delivery, so using potassium permanganate at this time has no effect on the uterus. Potassium permanganate should be used to sit in the basin. Take an appropriate amount of potassium permanganate and pour in an appropriate amount of water, and when the temperature is suitable, the mother can sit in the potassium permanganate solution to soak and sit in the basin. Each sitting time is about 5-8 minutes and should not be too long. It is recommended that the continuous use of potassium permanganate should not exceed 1 week. If used for too long, the skin of the vulva is excessively dry, which is not necessarily beneficial to the recovery of the wound. Also, care should be taken to avoid burns during use.