I am 16 and I've been expeiriencing extreme migraines every day for about a month. I drink tons of water, thinking that the pain is caused by dehydration but it either doesn't help or the pain becomes more extreme. These migraines occur when I put any sort of pressure on the back of my head. For example, I feel fine until I lay down, then the pressure from the pillow causes a migrane within about two minutes and I become extremely dizzy. I would not be worried except for the fact that they occur when slight pressure-even when applied from an object as soft as a pillow-is applied to the back of my head (the migraines do not occur when I apply pressure to the sides of my head). Do you recommend a cat scan??