Endometriosis is often not detected by contrast examination, which is only through the contrast agent into the uterine cavity, into the fallopian tubes to understand the development of the uterus whether there are deformities, whether the fallopian tubes are open, and endometriosis is often not detected. It is necessary to combine the medical history, gynecological examination, combined with ultrasound comprehensive analysis, and if necessary, also need to draw blood to check whether the CA125 is abnormally high, in order to finally diagnose whether there is endometriosis. If the endometriosis is in the ovary, it can cause ovarian chocolate cysts, which can cause dysmenorrhea. If the ectopic is in the myometrium, it can cause symptoms of adenomyosis. If ectopic in other parts of the body, there will be corresponding fluid dark areas and so on.