If this is something new, or you have it for a while? if you have it for a while you may have a cyst, and cyst unless if you get a surgery they dont go away, I dont know if is inside the sphinter, if is inside is just a hemorrhoids, you can take care of it with hemorrhoids cream in the pharmacy or if you feel shy buying it you may use Vicks Vapor Rub, I used with my hemorrhoid and is gone, Now I dont know your sexual preferences or practices, but could me a small rectal prolapse, either way go to the Doctor man! and show him your butt. What is the big deal? you are old enough. take care of that the sooner the better.