What Could This Be?

I seldom discover that I have inflammations on my lower lip. This swelling is always painless but noticeable. It hangs around for about an hour and a half and then gradually dimishes like it came? I once had that inflammation on my forehead (painless too) and then it would vanish.
What could this be? Can anyone please  tell me what it could be and what could be done?

 

i agree that u should see a doctor.
there could be a lot possible reasons.
rather than just sit and wonder, it wouldn't be a bad thing to get the help of a professional.
don't be embarrassed about seeing one at all.
thank God it's not painful.