There are many reasons for uterine distension, such as fibroids in the uterus, adenomyosis, and chronic pelvic inflammatory disease, all of which may cause uterine distension and pain. Before or during menstruation can cause uterine distension and pain because of the state of pelvic congestion and uterine contraction in the process of endometrial exfoliation, which can also lead to distension and pain. Before and after the menstrual period must pay attention to spicy, cold, stimulating food do not eat, do not have intercourse during the menstrual period, so as not to cause infection and lead to pelvic inflammatory disease. You should also pay attention to hygiene during sex, wash your underwear with warm water every day, and try to wear loose, cotton underwear. If the vaginal discharge is abnormal, active gynecological examination, routine testing of the white belt, symptomatic medication, anti-inflammatory treatment, so as to avoid upstream infection leading to pelvic inflammatory disease causing uterine distension and pain.