If the leucorrhea increases and has an odor during pregnancy, you can wash your vulva with potassium permanganate if you are sure that there is an inflammatory infection, but you should be careful not to use too much potassium permanganate in the process of washing the vulva and try not to wash the vagina. If you wash the vagina, you should be gentle to avoid stimulating the vagina and causing uterine spasms that could lead to miscarriage. If there are no inflammatory infections during pregnancy, it is not recommended to wash the vulva and vagina with medication. You can usually wash the vulva and vagina with water or warm water to keep it dry and clean to avoid the growth of bacteria. It is generally not recommended to use any random medication during pregnancy, such as topical or oral medication.