Is it possible for someone at 17 to have a brain tumor? I have found a very big lump on my head and its rather itchy also. I haven't hit my head at all this year so I cannot see why I would have a lump on my head? I also saw the skin doctor late last year but he, at the time, said I was fine. What should I do? Go back and see the skin doctor? Should I make it an urgent appointment or? Thanks.