Prolonged vaginal bleeding in unmarried women is considered to be endocrine disorders, uterine submucosal fibroids, endometrial polyps, etc., manifested by prolonged vaginal bleeding or heavy bleeding, incessant bleeding, accompanied by abdominal pain and so on. The common causes and manifestations of prolonged vaginal bleeding in unmarried women are as follows; 1. Ovarian endocrine dysfunction: women who have not had their first menstrual period for a long time during puberty have prolonged vaginal bleeding, which is due to endocrine dysfunction caused by imperfections in ovarian function, and normal menstruation will be restored with the gradual improvement of ovarian function. 2. Uterine submucous fibroid: unmarried women who have not experienced sexual life may have prolonged vaginal bleeding due to uterine submucous fibroid, which needs to be diagnosed by ultrasound. 3. Endometrial polyps: unmarried women with prolonged vaginal bleeding may also be suffering from endometrial polyps, which require ultrasound examination of the uterus to confirm the diagnosis. Unmarried women with prolonged vaginal bleeding need to go to the hospital in a timely manner, through the examination to determine the cause of the disease, and treatment for the cause.