Patients with endometriosis can drink soy milk in moderation because soy milk contains soy isoflavones, which have both estrogen-like effects and can counteract estrogenic activity. Drinking soy milk will not have adverse effects on endometriosis, and women can drink soy milk in moderation. Endometriosis is a condition in which the endometrial tissue with growth function is ectopic outside the uterine cavity, and the main pathological change is ectopic planted endometrium. The main clinical symptoms are progressive menstrual pain and infertility due to pelvic adhesions. Endometriosis is treated differently depending on the patient’s condition, age, and fertility requirements. For women with fertility requirements, conservative treatment should be adopted to promote pregnancy as soon as possible; for older women without fertility requirements, surgery can be considered if conservative treatment is not effective.