The Mannuelle ring has little effect on breast nodules, and the progestin in it has essentially no effect on breast tissue. The ring with levonorgestrel slowly releases progesterone in the uterine cavity. The progesterone content is low and only acts on the endometrial tissue, rarely entering the bloodstream, and does not cause breast nodules to grow. The Mannix Ring is mainly used to treat endometrial hyperplasia, adenomyosis, endometrial polyps and other diseases. As the ring has a certain amount of hormone content, you will usually feel breast swelling and pain after using the IUD, but this symptom will decrease with time. You should pay attention to regular checkups after the IUD, do a good job of local cleansing, and go to the hospital in time for consultation and treatment when discomfort occurs.