If the menstrual flow lasts for ten days or more, it is usually a menstrual disorder. The causes include regular late nights, stress, anger, cold, etc. In addition, in some patients, incomplete menstrual flow can be caused by organic lesions, endometrial lesions, etc., which need to be treated in a timely manner at a hospital. There are many reasons why menstrual flow lasts for ten days, and it is recommended to exclude pregnancy first. Some women are unaware of pregnancy and mistake abnormal uterine bleeding for menstruation. After pregnancy is ruled out, endocrine disorders are also an important cause, especially in adolescent and perimenopausal women, when the gonadal axis is disturbed for endocrine reasons, it may manifest as incomplete menstruation. If this is not the case, gynecological examination and ultrasound are recommended to exclude organic lesions, including cervical lesions, tumors of the uterine body and ovarian tumors. Women with incessant menstrual flow and prolonged bleeding may cause pelvic infection. It is recommended to pay attention to pubic hygiene, change sanitary napkins and underwear regularly, avoid sitting for a long time, try to identify the cause as soon as possible and treat it actively.