birth control
"The insertion did not hurt that bad and I did not have problems with my arm aching.  It did bruise pretty badly but went away after a couple of weeks.  The first 4 months I experienced extreme drowsiness and occasional headaches.  Eventually, it went away.  I have not had any significant problems with weight gain.  The hardest side effect to deal with has been the bleeding.  I got the implant inserted mid August.  I started bleeding about a week after that and did not stop until the beginning of December.  Since January, I get maybe 1 good week of no bleeding and then 3 weeks of heavy bleeding and spotting. Unfortunately, it is to only birth control option for me, but the bleeding is miserable."