GnRHa, or gonadotropin-releasing hormone, postoperative GnRHa needs to be started on days 1 to 5 of the first menstrual cycle, and should be administered as prescribed by the doctor, with attention paid to the side effects of the medication, and the application of adjuvant medications when necessary. Postoperative GnRHa is mostly used to reduce or delay the recurrence of endometriosis. The first postoperative use of GnRHa should preferably start on day 1 to 5 of the menstrual cycle and then every 4 weeks. The duration of a course of treatment is 3 to 6 months. It is best to treat with the medication under a doctor’s supervision and not to use the medication privately. Side effects such as fatigue and headache, depression and irritability, vaginal dryness, low libido, fatigue, and headache may occur during the use of the medicine, and it is important to find a doctor’s response in time for the appearance of on reaction. Usually pay attention to rest, appropriate activities, if after 4 months after the use of medication has not appeared menstruation, to go to the hospital in a timely manner.