The good thing about putting Mannitol Ring for uterine fibroids is that it can inhibit the growth of uterine fibroids and improve the symptoms of heavy menstruation and dysmenorrhea; the bad thing is that some adverse reactions may occur. Uterine fibroids are common benign tumors of the female reproductive system, different types of uterine fibroids have different clinical symptoms, most of the patients with uterine fibroids will have excessive menstruation, dysmenorrhea, lower abdominal masses and other symptoms. The occurrence of uterine fibroids is related to the high estrogen level in the patient’s body. 1. Benefits: There is a levonorgestrel slow-release system in the Mannix Ring, which can slowly release a highly effective progesterone in the uterus, slowing down the growth of fibroids by counteracting the effect of estrogen and relieving the symptoms of excessive menstruation and menstrual cramps. 2. The bad side: Because the Mannitol Ring continuously releases progesterone, which has a certain inhibitory effect on the uterine lining, long-term use of the Mannitol Ring may result in decreased menstrual flow or even progressive amenorrhea. Some women may also experience irregular vaginal bleeding, weight fluctuation and secondary ovarian cysts. These adverse effects are most pronounced within 3 to 6 months of wearing the ring, and the vaginal bleeding will gradually decrease with time. Patients with uterine fibroids are advised to choose a local formal medical institution for consultation, and if they choose to use the Mannix Ring for treatment, they should follow the doctor’s instructions.