I would imagine the lump is just scar tissue - if you do remove the piercing, just massage it every day - it will soon fade. I had my upper cartlidge pierced about 12 years ago, it took a good 5 maybe 6 years before it stopped hurting. I did find it all depends on what you have in there makes a big difference. I have a nose stud in mine (no back to it, its hooked so it stays in and when I lay on it it doesnt dig in. If you do remove it should be fine, as I say massage it every day you will see it will soon go down. Your right it, if it was infected you would have gunk and it would be very red (been there).