I have a terrible headache for nearly a year. Most of the time I suffer from headache. Whenever I'm in headache, a large stain of blood falls in my left eye. Most of the time, the inside of my head,especially behind my head, are burning badly.I just feel on both sides of my head that something is on both of my side,whenever I have an activity, that thing is shaking my head on both sides And it hurts painfully and shoots For example, when I lower my head down,the thing that I said is falling dow