The main reason for the brown watery discharge from the lower body is related to menstrual flow, endocrine disorder and abnormal pregnancy. 1. Menstrual flow: 1-2 days before and after the menstrual period, the vagina may bleed in small amounts due to the shedding of a small amount of endometrium. If the menstrual blood is not discharged in time, it may appear brown and no special treatment is needed. 2. Endocrine disorder: If the patient has recently been overly nervous, taking emergency contraceptive pills, etc., consider the symptoms caused by endocrine disorder. At this time, the patient can be observed first, the symptoms will usually disappear naturally, the patient should pay attention to rest and ensure sleep; 3, abnormal pregnancy: such as gravida, the patient can appear vaginal bleeding and other symptoms. In this case, you need to go to the hospital to pedestrian chorionic gonadotropin measurement, ultrasonography, magnetic resonance imaging and other tests to confirm the diagnosis, the disease needs to be cleared as soon as possible; 4, other: cervical polyps, fibroids, cervicitis, cervical cancer and other diseases can also lead to abnormal bleeding from the lower body, cervicitis and endometritis need to take antibiotics for treatment, cervical polyps, fibroids, cervical cancer need to choose surgery or chemotherapy according to the condition. Cervical polyps, fibroids and cervical cancer need surgery or chemotherapy depending on the condition.