After each coitus, there will be pain in the vulva, there are many reasons: 1, when there is vaginitis, due to inflammation stimulation, coupled with excessive frequency of stimulation during coitus, may cause pain in the vulva. It is recommended that before and after intercourse, try to use warm water or lotion to clean the genitals of both parties to avoid cross-infection. 2, there is no childbearing or childbirth, due to the tightness of the vaginal wall, during intercourse, due to the man’s genitals are bigger, it may cause excessive stimulation, which may lead to redness and swelling of the vulva, and may even be painful. At this time after intercourse try to use salt water or warm water to wash the vulva, which can reduce the local edema.