With a recurrence rate of about 20%, the probability of recurrence of chocolate cysts is still relatively high. If patients with chocolate cysts are not given careful intervention and care after the surgery, there is a high probability that it will lead to recurrence. The cause of chocolate cyst disease is the active endometrial cells planted in the ovaries, and it is difficult to remove all the active endometrium after surgery, so there is a possibility of recurrence. The most important thing after surgery is to take good care of the patient to prevent infection and not to resume sexual life too early after surgery. After the surgery, medication such as leuprolide or daphylline should be given for 3-6 months, subcutaneously on the first day of menstruation, once a month. Prevention is limited due to the unclear etiology of endometriosis, but it is very important to prevent menstrual reflux and to avoid multiple surgical operations on the uterus.