Uterine tumors are commonly uterine fibroids, most of them are a benign lesion, which should affect the location of some of the fibroids and affect menstruation, mainly related to the location and size. Generally, fibroids are divided into subplasma, intermural, and submucosal. Submucosal fibroids, because they project into the uterine cavity, will affect the shedding of the endometrium, which will lead to heavy menstruation and prolonged menstruation. Intermural tumors, if larger in size, can also affect endometrial shedding, resulting in menstrual changes. If it produces heavy menstrual flow and prolonged menstrual period, some of them will lead to secondary anemia, which is harmful to the body, and it is necessary to consult a doctor in time to ensure the recovery of the body. For menstruation, uterine fibroids under the plasma membrane generally have little effect on menstruation, only submucosal and intermural tumors of larger size will affect the occurrence of menstruation. Therefore, once a fibroid tumor is detected, in addition to regular checkups, it is also necessary to look at the clinical symptoms, if the clinical symptoms include prolonged menstruation and heavy menstruation, it is necessary to consult a doctor in time.