After hysteroscopic surgery, adhesion can be prevented by applying balloon, sodium hyaluronate gel and oral contraceptive pills. 1. Balloon: It is mainly to inject air or water into the balloon, and then put it into the uterine cavity, which has the effect of physical barrier, and can prevent adhesion, and the shortest placement time is about 7 days, and the longest time can be up to 1 month, for the existence of serious adhesion, can be placed in the balloon of Cook. 2. Sodium hyaluronate gel: injected into the patient’s uterine cavity, it can play a certain barrier, lubrication, and achieve the purpose of preventing uterine adhesions. 3. Oral contraceptive pills: Oral contraceptive pills contain estrogen and progesterone, which can promote the repair and growth and transformation of the endometrium. After hysteroscopy, patients are advised to pay attention to rest, do not overwork, and go to the hospital in time when abnormalities such as vaginal bleeding and abdominal pain are found. The above drugs should be used under the guidance of a physician, and patients should not self-medicate to avoid causing adverse reactions.