Mirena
"Great!! No one posts the good reviews so I thought I would shed some light!
This was awesome had it for a little over two weeks now and I have no issues.
After the initial insertion (which hurt but was a breeze, took 2 minutes tops)I had pretty painful cramps for about 12 hours after. I was fine the next day which some brown discharge and bloating for around a week.
1. This IUD does not cause acne, but it lacks estrogen like the pill or other forms of birth control that help with clearing up acne. So you may get more pimples than usual but its what you would normally have with out the pill.
2. It doesn't effect weight gain, any weight gain maybe an un related issue from the birth control."