The generic name of Mannuelle ring is levonorgestrel intrauterine system, the use of levonorgestrel intrauterine system does not cause the body to experience weight gain, the symptom may be related to other causes, it is recommended to pay attention to it in time. Levonorgestrel intrauterine system is the more commonly used type of birth control device in the clinic, with the role of contraception. Its principle of action is that the device contains a high level of progesterone release system, through the release of hormones against the body estrogen, and then make the endometrium and other parts of the uterus in the state of not easy to fertilize, and ultimately achieve contraceptive effect. However, according to the current data, levonorgestrel intrauterine system does not have the adverse effect of weight gain, so the appearance of such symptoms may indicate the presence of other diseases, if the patient’s symptoms are serious, or the symptoms continue to fail to improve, the patient should go to the hospital in a timely manner to consult a doctor for treatment.