Levonorgestrel
"Had the skyla IUD implanted in June after having continuous bleeding on multiple combo pills for about 9 mos. Insertion was not bad - just some bad cramps for a few days after. First 2 mos I experienced stabbing pain cramps and then it evened out. I'm opting to have it taken out after 5 mos. After 2 months, my acne has gotten considerably worse; while on pills my skin was fairly clear/only broke out in a few pimples during my period. Now I have developed cystic like acne (NOT GOOD). Also, I have experienced a lot of hair loss and my hair has thinned a lot (I have fairly thick hair) and have been having nasty headaches on a regular basis for the past 3 weeks. Good method of bc - IF you don't end up with nasty side effects."