There may be a variety of cases of small abdominal pain and brown leucorrhea, but they mostly suggest intra-vaginal or uterine bleeding, which often requires us to seek medical examination in time to investigate the relevant causes, often related to ovulatory bleeding, early pregnancy, pelvic inflammatory disease and other conditions, which need to be treated symptomatically after clarifying the cause. 1. ovulatory bleeding: due to fluctuations in the level of estrogen caused by ovulation, causing the endometrium to shed and regular vaginal bleeding, which can occur via defecation Bleeding, accompanied by mild lower abdominal discomfort or lower back pain. It is recommended to do ovulation test and basal body temperature to confirm the diagnosis. If it belongs to ovulation bleeding, there is no need to deal with it and observation can be done. 2. early pregnancy: there can be abdominal pain, brown leucorrhea, nausea, morning vomiting, fatigue and other symptoms. The diagnosis can be confirmed by C-reactive protein test and endometrial biopsy. The medication can be followed by a full course of treatment with sensitive drugs, generally recommended for 10-14 days.