If the fluid in the uterus reaches 5mm or more and does not subside after anti-inflammatory treatment, the uterus needs to be removed. If the fluid in the uterine cavity is more than 5mm, pelvic physiotherapy or anti-inflammatory drugs can be given first, but if it does not go away or if the woman also has lower abdominal pain, she needs to be treated with uterine evacuation. Normally, a woman’s uterine cavity can only contain 5 ml of fluid, which is the exudate of the uterine cavity and does not cause any discomfort. If there is more fluid in the uterus and there is discomfort, most women are suffering from endometritis and need to be given anti-inflammatory and anti-infection treatment in time. Women should also pay attention to the active treatment of vaginal inflammation in order to avoid upstream infection.