Adenomyosis is a type of endometriosis lesion, a cyst formed when endometrial cells become ectopic to the myometrium, and is intrinsic endometriosis. It changes periodically with the menstrual period and causes clinical symptoms such as dysmenorrhea and increased menstrual blood volume. The Manned IUD is a female birth control device, medically known as the levonorgestrel extended-release system, whose primary function is contraception. However, through the uninterrupted release of levonorgestrel, the endometrium can be thinned (effectively preventing the fertilized egg from being laid) so that the cervix, uterine cavity and ovarian lining are not suitable for pregnancy; during the period, the ovarian lining is in a dormant state so it can effectively reduce the volume of menstruation and shorten the bleeding time during menstruation, thus relieving menstrual pain. Therefore, it can help to relieve the heavy menstrual flow and dysmenorrhea caused by adenomyosis, especially in the early stage of adenomyosis. At present, the main treatment for adenomyosis is non-invasive ultrasound ablation and surgery, but there is no other good treatment means. Therefore, patients with adenomyosis should go to a regular hospital as soon as possible to confirm the diagnosis; at the same time, patients should pay more attention to rest and avoid eating cold, spicy and other stimulating foods.