If, after ultrasound examination, abnormal echogenicity or superfluous organisms are found in the uterine cavity, it is best to do hysteroscopy if the menstrual period is 3-7 days clean, if there is no intercourse, if the routine leucorrhea is normal, and if the blood routine and coagulation time are not abnormal, and if the hysteroscopic instructions are given to remove the superfluous organisms from the uterine cavity. At the same time, diagnostic scraping is recommended, and the removed tissue and the endometrium from the diagnostic scraping will be sent for pathological examination respectively, and treatment will be given according to the clinical results. In this case, it is necessary to keep the vulva clean after the operation, not to have sex for 1 month, and it is recommended to wash the vulva with water 2 times a day to avoid pathogenic infection.