"i have been on nexplanon since january 2013, when it was put in my arm it didn&#039;t really hurt, kinda just pressure. i bruised for about a week but then it went away. honestly 99 percent of the time i don&#039;t even remember that i have it, it doesn&#039;t hurt in my arm, or anything. i have no side effects, except that my acne got a little worse but that could just be because i&#039;m 20 and still young. it had worked for me 100% of the time, i have no gotten pregnant and i have no had a period since it was inserted."