Hi, there. Unexplained bump on upper left side of forehead (close to hairline). This pops up every now again, but has always done so after a night of drinking. I ve laid off the alcohol, and it went away, but I noticed it was back this morning. The lump isn t painful and I can put pressure on it and virtually feel nothing (there may be a little tenderness from messing with it). It s about the size of a dime. Should I be worried? I have no other symptoms (no headaches , no vision changes, no trouble concentrating etc...)