For the past 4-5months, I've been getting Very Short Sharp pains/headaches in my right frontal lobe. Also, from my right shoulder blade, to my clavicle, and right arm. Just Sharp pains. The pain in my arm and shoulder is a lot longer than that of my head. I've been reading about sharp pains, and one of the causes is a brain tumor. I also get nauseas, and have involuntary muscle spasms. I'm afraid...i really have no idea what it is.