Pain during coitus is generally due to two reasons: first, lack of psychological knowledge of sexual life, some psychological tension. In sexual life, because of the mood is more nervous, fear, there is a lack of vaginal secretion, the lack of secretion can lead to vulvar dryness, in this case coitus will appear pain. Second, women have reproductive system diseases, such as vaginitis, cervicitis or pelvic inflammatory disease, when the inflammation attack also lead to pain during sex. Third, other diseases, such as endometriosis, painful nodules in the pelvis, can also cause pain during intercourse. Therefore, when there is pain during intercourse, it is recommended to go to the hospital to check whether it is caused by psychological factors or diseases, and make appropriate treatment according to the examination.