Just wanted to let you know that about 10 months after having the device my arms started going numb. I thought I had a problem in my neck, but all the tests showed that it was carpal tunnel. I slept with wrist splints for about 9 months and have had the device out for about 5 months. I am no longer sleeping with the splints and my wrists feel stronger and I have had no numbness in my arms. I will always believe that the mirena had something to do with this diagnosis because I did not have any of the normal reasons for getting it.