The common causes of uterine cavity infection are hysteroscopic operation, cesarean section operation, and bad hygiene habits. 1. Hysteroscopic operation: such as hysteroscopy, abortion, diagnostic scraping caused by infection, there will be lower abdominal pain, increased secretion with odor, sometimes with fever and other symptoms. 2. Cesarean section operation: bacterial infection caused by cesarean section operation, the main symptom is abdominal pain, manifested as lower abdominal pain, radiating to the waist, lower abdominal uterine pressure pain, may also manifest as increased post-partum discharge, accompanied by a fishy odor and increased bleeding. 3. Bad hygiene habits: usually do not pay attention to menstrual hygiene, coitus, swimming, unclean sex and other bad habits, resulting in uterine infection. There are other factors that may cause uterine infections, so you should go to the hospital outpatient clinic in time to get a clear picture of the cause of the disease, and then follow the doctor’s instructions under the guidance of a professional physician.