has anyone else had a child with this? He has a small lump, like half a pea sized, behind his ear, it's hard and bony to the touch. He hasn't complained of any pain, it's just something I noticed and thought, ooh, that shouldn't be there. It is not a wart, it is hard. Just wondered if anyone knew what it could be. It is not getting any bigger, and I think he's always had it..