Hi! M.,
I had Mirena & developed acne, as well. Now, I don't know what caused it-- either the birth of my 11 month-old or the Mirena-- which was placed 6 weeks after I delivered. Either way, I decided to have it removed, not only because of the acne (which I also got on my upper thighs and arms), but also because I was feeling bloated & gassy all the time.
It's just been about a week & hard to tell if it's made too much of a difference, yet.
I am a nurse and was bummed by it's removal because I feel it-- as well as-- most modern birth control, has been researched and is a great way to maintain a spontaneous sex life, not to mention how beneficial it can be for women suffering with terrible periods and PMS. Granted, it will affect everyone a little differently, but if you have no risk factors, birth control such as this and the pill have made a huge difference in many a woman's life.
What has been working for me, as far as the acne is concerned, is Clean & Clear Continuous Cleanser plus the Clean & Clear astringent-- which I then follow-up with Clean & Clear gel for spot treatment. It seems to be working fantastically!
I did quite a bit of research on acne care lines & this one got rave reviews-- and, best of all, it doesn't break the bank.
Good Luck!