Prolonged menstruation requires hormone six, blood test, gynecological examination, ultrasound, hysteroscopy, colposcopy, biopsy, etc. The appropriate examination method should be chosen according to the specific cause of prolonged menstruation. 1. Endocrine disorders: some of the prolonged periods may be related to endocrine disorders, such as perimenopause, hypothalamus-pituitary-ovarian axis regulatory dysfunction, you can go to the hospital for hormone six tests to understand the hormone secretion. 2. Pelvic inflammatory disease: if the disease develops during menstruation with increased menstrual flow and prolonged menstrual period, ultrasound examination can be carried out to find out whether there is any pathologic fluid accumulation in the pelvis, and then the examination can be carried out for the pelvic organs, such as the fallopian tubes, ovaries, uterus, etc. In addition, blood routine, blood sedimentation, and C-reactive protein and other examinations are also needed. 3. Uterine fibroids and endometrial polyps can also cause prolonged menstruation, which can be examined by ultrasound in the hospital to make a clear diagnosis, and hysteroscopy and pathological biopsy are needed to exclude malignant lesions if necessary. 4. Cervical cancer and endometrial cancer: they can also cause prolonged menstruation, which usually need imaging examination, colposcopy and biopsy for clear diagnosis. Prolonged menstruation should be treated according to other conditions of the body, and appropriate examination methods should be chosen under the guidance of doctors to clarify the cause of the disease and treat the symptoms.