Menstruation more than 10 days of brown not clean situation belongs to the dribbling, the causes are more, consider and drug factors, endocrine disorders, disease factors related. 1. Drugs: For women who take birth control pills at will, the hormone levels in the body may be out of balance, resulting in menstrual irregularities and symptoms of irregular periods. 2. Endocrine disorders: common such as ovarian luteal insufficiency, luteal endocrine insufficiency leads to the secretion of progesterone insufficiency, and thus ovulatory dyskinesia, so there will be a menstrual period more than ten days of brown unclean symptoms. 3. Disease factors: If women have endometrial polyps, endometrial hyperplasia, submucosal fibroids, uterine scar diverticulum, endometrial cancer and other diseases, it is possible to produce menstrual dribbling due to local stimulation. In conclusion, women need to go to the hospital as soon as possible after the occurrence of prolonged periods, under the guidance of the doctor to clarify the causes before treatment, to avoid blindly using drugs.