I have experienced the following side effects:
weight gain (20 pounds over 3 years) despite eating right and exercising
terrible cystic acne, particularly on my jawline
moodiness - feeling very short tempered
backaches every morning upon waking
hands going numb while sleeping
I have had the Mirena removed 9 days ago and already my face has cleared up. I have lost 3 pounds and I have not had a backache or hand numbness since the day after the IUD was removed. I am convinced all side effects were directly attributed the Mirena IUD.