My step son has a hard lump on the side of his head. When it grows it effects his behavior, learning capability and he also will pee his pants when it grows. I talked to his Dr and when it was swollen I ran him in to see the Dr but she has no idea what it could be. It's not where his soft spot was when he was a baby nor is it where tbe plates in the skull meet. He has had this ever since we knew him at the age of 2, he is now six. My husband and I just got custody of him, and from what we know the bio mother would hit him in the head and slam his head on the floor and so much more. He has an appointment to get it looked at on June 7th but they won't be able to see anything unless it swollen.