That sounds kinda odd. Scar tissue isn't like that. Being the sick person I am, I would be sticking a needle in their and seeing if there was anything to drain in it. Either that or I would try to pop it. But I am a lil sick. LOL Seriously though, if it's been there for a year, it's probably no harm to you. Maybe next time you are at the doctor, ask him. I doubt it's anything to worry about.