Your doctor should have given you a pamphlet about the side effects. Basically common ones include heavy bleeding, discharge, inflammation, back pain, stuff like that. If it gets out of position it can cause discomfort for you or your partner. You can google the side effects and read what other women have experienced. It was convenient for me while it worked, but I really didn't need the anemia that came with it. Then it got out of place and I had to get it out.