The reasons for painful intercourse are as follows: First, if it is the first time to have intercourse, it may be due to nervousness and strong contraction of the smooth muscle of the vagina, which stimulates the autonomic nerve in the vaginal wall to produce pain when having intercourse, which is transmitted to the cerebral cortex and makes people feel pain. Secondly, if you don’t have intercourse often and have pain during intercourse, it may be due to nervousness and vaginal dryness because the vagina does not secrete enough lubricating fluid, which stimulates the nerve fibers on the vaginal wall and causes pain during intercourse. Thirdly, the other party may not comfort the woman properly during intercourse or the other party may act inappropriately, which may also cause some trauma to the woman’s vagina and even bleeding, thus making the woman feel some pain. Fourthly, women may suffer from gynecological diseases such as vaginitis, cervicitis, pelvic inflammatory disease, etc. When suffering from inflammatory diseases, the mucous membrane will have certain erosion and ulceration, which will cause women to feel pain when stimulating the area during intercourse.