It is not necessary to wash the vulva with potassium permanganate and then wash it again with water because potassium permanganate is a strong oxidizing agent, which has the effect of sterilization and disinfection. If you use water to wash again, it will reduce the effectiveness of the medicine, so it is not necessary. In addition, if potassium permanganate is used to wash the vulva, if the local inflammation of the vulva is obviously red, swollen, hot and painful, then it is recommended to apply Bactrim or erythromycin ointment locally after washing, so that the course of the disease will be significantly shortened. In addition, if the inflammation is localized in the vagina, it is recommended to insert the appropriate medication into the vagina after washing in order to achieve a complete clinical cure, and it is also recommended that the concentration of potassium permanganate is 1/5000 so that the vulva will not be burned due to the high concentration.