Small abdominal distension and pain accompanied by brown discharge from the leukorrhea is clinically common for the following reasons. The first and most common is caused by inflammation of the pelvis. When there is inflammation of the pelvis, it will lead to inflammatory exudation and cause a decrease in local elasticity, so it will lead to lower abdominal distension and pain. The leukorrhea will appear brownish discharge, often because the endometrium also has an inflammatory reaction, so it will cause this brown discharge. In addition, long-term chronic inflammation of the pelvic cavity can also lead to local inflammatory reactions in the ovaries, so vaginal bleeding may also occur. Secondly, tumors in the pelvis can cause this. Thirdly, endometriosis can also cause this symptom, so it is recommended to go to the hospital for examination in time and give clinical treatment according to the examination result.