Brown discharge from the lower body can be caused by a variety of reasons, usually related to bleeding, where the blood oxidizes and turns brown. The more common causes are ovulatory bleeding, vaginitis, cervicitis, cervical polyps, cervical cancer and precancerous lesions, etc. The causes need to be clarified and treated according to different symptomatic manifestations and examination results. 1. Ovulatory bleeding: A brief drop in estrogen level due to ovulation, which results in endometrial shedding and causes regular vaginal bleeding, accompanied by mild lower abdominal discomfort or lumbar soreness. It is recommended to do ovulation test and basal body temperature measurement to confirm the diagnosis, and can be treated with oral estrogen and hemostatic drugs, or with acupuncture by Chinese medicine. 2. Vaginitis: there can be increased vaginal discharge, purulent leucorrhea with abdominal pain. The symptoms include brown leucorrhea with blood, irregular menstruation, dysmenorrhea and pelvic heaviness. After diagnosing the cause, physical therapy such as laser, freezing, microwave infrared, etc. can be used, and Chinese herbal medicine can also be given. 4, cervical polyp: there can be abnormal vaginal bleeding, increased leucorrhea, mucus discharge, accompanied by foreign bodies in the vaginal opening, vulvar itching and other symptoms, pathological examination and hysteroscopy should be performed to confirm the diagnosis. Preferred surgical treatment such as polyp removal. If there is bleeding, drugs can be applied to stop bleeding and pain; 5. Cervical cancer and precancerous lesions: there can be symptoms of white or bloody vaginal discharge, which is manifested as brown discharge from leucorrhoea. Cervical scraping cytology and colposcopy are recommended. If cervical cancer is diagnosed, surgical treatment, radiotherapy and chemotherapy are feasible. Patients suspected of precancerous lesions should undergo cervical biopsy to confirm the diagnosis and feasible surgical treatment or treatment with interferon drugs; 6. Other bleeding conditions: such as fertilized egg implantation in early pregnancy, ectopic pregnancy, endometritis, etc. It is recommended to consult the doctor for clear examination and take corresponding treatment measures according to different causes.