The Mannuelle ring generally refers to the levonorgestrel intrauterine sterilization system. After using levonorgestrel intrauterine device system, women have been running watery vaginal discharge, which may be normal physiological phenomenon, secondary inflammation, gynecological tumors, etc. According to the different causes of morbidity, we will take observation, anti-inflammatory, surgical and other treatment methods. 1. After using levonorgestrel intrauterine device system, women will have aseptic inflammation locally, sometimes there will be the phenomenon of watery vaginal discharge all the time, but there are no other symptoms, which is a physiological phenomenon and does not need special treatment. 2. Some women use levonorgestrel intrauterine device, due to local mucosal damage, resulting in vaginitis, cervicitis or endometritis, the inflammatory reaction leads to vaginal discharge is watery. If gynecological inflammation can be identified through leukorrhea examination or gynecological examination, anti-infection treatment should be carried out in a timely manner. 3. Many patients with malignant tumors of the fallopian tubes or ovaries may also experience watery vaginal discharge after using levonorgestrel intrauterine device. After the patient is identified as malignant tumor through laboratory examination and ultrasonography, early surgical treatment should be performed.