Uterine fibroids may cause persistent vaginal bleeding, especially in submucosal fibroids, and if they become infected, the patient may have persistent vaginal bleeding throughout the menstrual cycle. If the fibroids are between the walls of the uterus or submucosa and do not affect the endometrium, the effect on menstruation is relatively small and usually does not cause bleeding, but if the fibroids are between the walls of the uterus or affect the endometrium, they may cause excessive menstruation, prolonged menstruation, and in severe cases, excessive bleeding. The main treatment for uterine fibroids that bleed more than once is surgery to avoid further development of the condition, which can affect the health of the body.