The onset of menstruation after intercourse usually has no effect and is related to the individual’s resistance and immunity. As long as there is no local itching, pain or odor in the vulva afterwards, it means there is no effect. If the above symptoms occur, they may be related to inflammatory infections caused by the body’s decreased resistance. Because the body’s resistance decreases during menstruation, having menstruation right after intercourse may cause infection. You can wash your vagina with warm water in time to keep your vulva clean. Use cotton, good quality sanitary napkins to reduce local stimulation will significantly reduce the chance of infection. If there is local itching or pain in the vulva, you can use red nucleus lotion or cleansing lotion to wash the vulva, but do not rinse the inside of the vagina. You can insert nifurtimox and clotrimazole vaginal suppositories vaginally after menstruation.