What's this bump on my earlobe?

I have this like bump on my earlobe where my second hole is. I can still put my earring in it and everything but it like bulges out from behind my ear. I've had this bump for like 3 years. I keep telling my parents I need to get it checked out but they keep saying it'll go away which it hasn't! I asked a piercer and he said it was scar tissue.. but that's it.. I want it gone. HELP?