It can sometimes mean you have bitten your lip.
I'm no doctor but either you have a hold sore or a wart.
The best way is to do a biopsy. But a bump on the lip can be many things.
Maybe a mucocele. See http://www.kadavy.net/blog/posts/lump-in-mouth-or-lip-maybe-a-mucocele/ Maybe a mucocele. See http://www.kadavy.net/blog/posts/lump-in-mouth-or-lip-maybe-a-mucocele/ It sounds like a canker sore. You probably got it from kissing your mom.
A bump in the lip may be caused by a blow to the mouth or hitting the mouth against a hard surface. The lip swells and forms a bump, with possible bruising. Try and apply an ice pack to the bump as soon after injury as possible to reduce swelling.
One reason that the inside of your lip is sore and red could be the Herpes Simplex Complex that causes redness and soreness.
Simple answer go back and talk to the one who did the piercing, they are accountable for the job they do and they should render assistance to you when you have issues with the piercing. That's why they charge you so much, they are suppose to help you when you need help. Go talk to them.
Well, from the question you spoke of you have acquired a hickey, which is when he might have bit your lip a little, so ya.
Yes, it is a virus called oral herpes which manifests itself as a cold sore, or "bump".
you probably are allergic, but you didn't know it.
There are cures available for lip bumps. The remedy you could use would depend on what type of a bump you have.
It could be a cold soar or another infection.