What are the side effects of Mirena?

Although it can be a great contraceptive choice, the Mirena IUD has several potential side effects one should be aware of. Some of the less evasive side effects can be: headache, acne, and change in menstrual flow. Some of the more evasive side effects include mood changes, breast tenderness and lower abdominal and Back pain. There are also some more serious risks such as ovarian cysts, perforation of the uterus wall and infection.