5 months ago I think I bumped my head on my car doorway. I didn t notice it when I did it, but an hour later, started to feel a tender spot on my head and it was right in the area of where my doorway would hit, so I assumed that s what it was from. By the next day it was a large goose egg and was very sore. It gradually started to improve to a point, but eventually it seemed more like it was maybe bite as it seemed to have a head. Now, 5 months later there is still a sore bump. It s not as large as it was at first, but hasn t shrunk for the past several months. Is this anything to worry about? Should I have it looked at.