Brownish discharge for 19 days after hysteroscopic polyp surgery is considered to be related to infection of the uterine cavity. The removal of polyps under hysteroscopy may damage the endothelial tissue, resulting in a small amount of vaginal bleeding, which usually lasts for about 1 week and can disappear on its own. If the brown discharge lasts for 19 days, it is considered to be related to the infection of the uterine cavity caused by the lack of strict aseptic operation and lack of attention to personal hygiene, and the increase of inflammatory exudate will affect the healing of the local trauma and the vasodilatation, which will lead to prolonged vaginal bleeding. If brown discharge persists after the removal of polyps by hysteroscopy, it is recommended that the patient go to the gynecology department of a regular hospital as soon as possible to improve the ultrasound, blood test and other related examinations, so as to clarify the cause of the disease and actively treat it under the guidance of the doctor, so as to avoid aggravating the disease and affecting the postoperative recovery.