After surgery for chocolate cysts, the recurrence rate is still very high. In order to prevent recurrence, treatment is often carried out with Dafirin, which is usually used for three to six months to prevent recurrence, and Dafirin costs about 2,000 yuan a piece. In addition, you can also prevent recurrence by putting on the Manuelle ring. After the Manuelle ring is inserted into the uterine cavity, the endometrium will shrink, which will reduce the amount of menstruation and even end up with amenorrhea, then the foci of endometriosis will also shrink, which will also achieve the purpose of preventing recurrence. The validity period of the IUD is five years. After five years, if you still need treatment or contraception, you can replace the IUD with a new one.