Premenstrual bleeding caused by chocolate cysts can be treated with medication, and if the cysts are large and the patient’s symptoms are serious, surgery should be performed according to the condition. 1. Medication: Chocolate cysts are hormone-dependent tumors, which can be treated by taking hormone medication orally to make the body in a state of “false pregnancy” and alleviate the uncomfortable symptoms, and the commonly used medication in clinic is deoxypregnene ethinyl estradiol tablets. Deoxypregnene ethinyl estradiol tablets are contraceptives, which can be taken to prevent pregnancy and regulate menstrual cycle, but may cause breast pain, headache, depression and other adverse reactions. 2. Surgery: If the cyst is larger than 5 cm, the patient has already experienced symptoms such as irregular menstruation, dysmenorrhea, bleeding, etc., and the effect of hormone medication is not good, the condition is more serious, and it is necessary to perform surgical treatment of cyst removal. The patient should go to a regular hospital for examination, the doctor will formulate a treatment plan according to the specific conditions of the cysts, and should not use medication without authorization.