The term “menstrual period” generally refers to menstruation. Menstrual bleeding, heavy menstrual flow with blood clots should be treated according to the cause of menstruation, and surgical treatment is needed for uterine fibroids, and medication is needed for uterine adenomyosis. 1. Uterine fibroids: For large intermural fibroids and submucosal fibroids, which can cause excessive menstrual flow and prolonged menstrual period, ultrasonography and gynecological examination can be used to assist in the diagnosis. Surgery, such as myomectomy or hysterectomy, should be performed according to age and fertility requirements. 2. Uterine adenomyosis: It may also cause symptoms such as excessive menstrual flow and prolonged menstrual period, as well as progressively worsening dysmenorrhea. Diagnosis can be assisted by ultrasonography, gynecological examination, etc. Treatment depends on age and fertility requirements, and resection of lesions is feasible for those who are young or have fertility requirements. However, total hysterectomy is recommended for those with severe symptoms and no fertility requirements. 3. Abnormal uterine bleeding (1) Anovulatory abnormal uterine bleeding: it can also cause excessive menstrual flow with blood clots, which can be diagnosed by combining with medical history, gynecological examination, endocrine examination, etc. Progesterone, estrogen and other medications can be given according to the doctor’s instructions, and curettage is needed if necessary. (2) endometrial polyps: can also cause menstruation can also cause prolonged menstruation, excessive bleeding between periods and other symptoms, can be assisted in the diagnosis of ultrasonography, feasible hysteroscopic endometrial polypectomy, excision of tissues sent to pathological examination. When there is a large amount of blood with blood clots during menstruation, it is necessary to go to the hospital in time to find out the cause and actively treat it.