The IUD is useful for patients with adenomyosis, especially for those with mild to moderate adenomyosis, but for those with severe adenomyosis, it is advisable to treat them with medication or surgery. 1. Adenomyosis is a common gynecological disorder caused by the endometrium getting caught in the myometrium, often accompanied by changes in menstrual flow and progressively increasing dysmenorrhea. 2. The Manned Ring is a commonly used intrauterine device, mainly used for contraception. The Manned Ring contains levonorgestrel, a progestin, which can inhibit the proliferation of the endometrium through slow release, relieving dysmenorrhea and achieving the effect of treating adenomyosis. 3. The Manned Ring is used for five years, so be careful to replace it when it expires to avoid reducing the contraceptive effect and therapeutic effect.