The Mannitol Ring is a levonorgestrel IUD system. Abnormal vaginal bleeding, menstrual disorders, dizziness, headaches and abdominal pain may occur after using the levonorgestrel IUD system. The levonorgestrel IUD system contains certain hormonal medications and is used clinically as a contraceptive or to regulate menstruation. Some women may experience discomfort after using the levonorgestrel IUD system, and may experience intermittent vaginal bleeding and increased secretions. At the same time, the levonorgestrel IUD system is a foreign body to the uterus, so there may be pain in the lower back and abdomen. At the same time, the levonorgestrel IUD system contains a certain amount of hormone drugs, so through the release of drugs may cause female hormone level disorders, resulting in thinning of the uterine lining, resulting in decreased menstrual flow, amenorrhea and other phenomena. If the patient has slight discomfort, he/she can take more rest and observe, if the symptoms are more serious, it is recommended to consult a doctor in time and take treatment under the guidance of a doctor.