Overall, hysteroscopy is less harmful than blind curettage. Hysteroscopy is divided into two steps: examination and treatment. If only hysteroscopy is performed without uterine manipulation, it usually does not affect the patient’s uterine cavity; if hysteroscopy shows intrauterine lesions, scraping under hysteroscopic monitoring is required. From this point of view there is harm between both, because all scraping carries the risk of bleeding, the risk of endometrial damage or adhesions, and the risk of causing the chance of infection of the uterine cavity. However, when hysteroscopy is performed, it can reduce the chance of uterine perforation during the scraping process; moreover, the lesion can be directly observed during the scraping process, and the material can be taken more accurately, which can reduce the leakage that occurs when scraping blindly; in addition, the endometrial lesion under hysteroscopic monitoring is only localized, and scraping can be done at the scraping site without scratching other parts of the uterus, which can minimize the damage to the endometrium. The damage to the endometrium can be minimized.