It sounds to me like they are describing a sinus infection. I have them chronically due to an old injury to my nose and they cause me pain in my face, the top of my head, behind my ears, the back of my head and in my jaw. My brother gets sinus infections due to allergies and they cause him pain all over his head. If they are referring you to an net then the problem isn't your brain which is good news. I highly doubt it is a tumor, could be a run of the mill infection or an impacted sinus, neither of which are a big deal both treated with sprays and antibiotics. Worst thing about it that the sprays taste bad when they run down your throat.