Slightly dense endometrial shadow, 27mm in diameter, requiring hysteroscopy and segmental curettage. Color ultrasound found endometrial high-density shadow, diameter 27mm, first of all hysteroscopy and segmental diagnostic scraping, must be signed before the operation. Hysteroscopy was performed to understand the morphology of the uterine cavity and the location of the dense shadow in the uterine cavity. Pathologic examination was performed after the operation, and according to the results of the pathology, medication or surgical treatment was given. Hysteroscopy and pathology can be used to diagnose endometrial polyps, submucosal fibroids, incomplete abortions, and abnormal uterine bleeding. Once the diagnosis is clear, treatment can be given, depending on the results of the examination, with medication, surgery, radiotherapy and chemotherapy. Women of childbearing age who have abnormal uterine bleeding and ultrasound findings of space occupation in the uterine cavity should go to the hospital in time for examination, make a clear diagnosis in time, and follow the doctor’s instructions to deal with the treatment.