If the brown discharge is not during menstruation, it is often caused by the following clinical reasons: first, if the brown discharge is accompanied by lower abdominal pain, it is often caused by chronic pelvic inflammatory disease, and a preliminary diagnosis can be made through gynecological examination. The second is caused by endometrial lesions. When the endometrium is inflamed or cancerous, it may lead to brown discharge, and it is recommended to understand the endometrial condition through ultrasound examination, and if necessary, diagnostic scraping should be done before giving a clinical diagnosis. Thirdly, clinically it may be caused by endocrine disorder, when relatively fatigue or environmental changes, emotional changes may lead to endocrine disorder, which may cause the endometrium to lose hormonal support, resulting in less endometrial shedding and bleeding, through clinical examination can make a preliminary diagnosis, and then give the corresponding clinical treatment.