The normal situation is that women should have intercourse after three days of menstruation, because during menstruation the endometrium is shed and the wall of the uterus has a trauma, which needs to be completely repaired three days after menstruation. If a woman suffers from acute endometritis, she will experience severe abdominal pain. If chronic inflammation is not treated thoroughly, it can easily lead to uterine adhesions or fibrosis of the uterine wall, causing infertility. The endometritis can also easily cause adnexitis or pelvic inflammatory disease, which seriously endangers women’s health. Premature intercourse can also easily cause uterine bleeding, and endometriosis can also easily cause dysmenorrhea, which seriously affects women’s health.