Mannitol refers to the levonorgestrel IUD system. On the levonorgestrel intrauterine device system and then grow endometrial polyps may be caused by endometrial stimulation or polyps appear malignant and other reasons, to take minimally invasive surgery, removal of levonorgestrel intrauterine device system ring and other ways to treat. 1. Remove levonorgestrel intrauterine device: levonorgestrel intrauterine device is a kind of birth control ring, which needs to be placed in the uterine cavity to effectively achieve the effect of contraception, but the ring belongs to a kind of foreign body in the uterine cavity, and when placed, it may cause stimulation to the mucous membrane of the endometrium as well as to the surrounding tissues, which leads to endometrial inflammation, and then leads to the growth of polyps. 2. minimally invasive surgery: if polyps, in order to avoid the further growth of polyps, you need to go to the hospital regularly for review, to understand the growth of polyp changes, if the polyp is relatively large, to avoid the polyp malignant changes, you need to go to the hospital for minimally invasive surgery, excision of lesions. Attention on the levonorgestrel intrauterine sterilization system appear polyps to be timely treatment according to the condition.