Enema is a relatively common operation, as long as not in pregnancy, menstruation and other states of most women enema generally do not have side effects, but short-term frequent enema may appear rectal ulcer, rectal gangrene and other complications. An enema is a prepared enema solution or medication that is poured into the colon and rectum to diagnose, treat diseases, and promote defecation; enemas are not allowed for women suffering from acute abdomen, severe cardiovascular disease, hepatic coma, renal insufficiency, hepatic insufficiency, as well as during pregnancy and menstruation. It should be noted that frequent observation in a short period of time may induce complications such as rectal ulcer and rectal gangrene. Female patients requiring enemas are advised to actively cooperate with the doctor’s procedure.