The most common clinical cause of vulvar itching during menstruation is localized inflammation. Since blood volume increases during pregnancy, this excess blood volume will be discharged from the body by sweating during menstruation, so the vulva will often be localized with sweat. If the local care is not strengthened, it may lead to the infection of pathogenic bacteria, because there will be a large amount of bad dew discharged after delivery, it will cause inflammatory reaction. It is recommended to scrub the vulva with iodophor every day and apply dermatophores locally to relieve itching. It may also be caused by allergy to sanitary napkins. In the postpartum period, due to the discharge, sanitary napkins are often used 24 hours a day, and if the sanitary napkins are not changed in time, the allergy to sanitary napkins may cause itching, which can also be treated by applying dermatophores.