yes, i can believe it cause i had a bump like that 2 months ago, i was staying with my brother for a couple of days and missed a step on the garage and fell right on my forehead, had a lump the size of an egg, for the next two wks everyone was asking me about my black eye, i was so glad when it healed. maybe you should get it checked, how did you hit your head anyways?
next time use a hammer instead of your head
what'd you hit? and why?