Hi, I have this weird spot on my left side of my head, you can't see it, or feel it to the touch, but its VERY sore and wen i touch it, the soreness goes away but once I let my hand off it, it REALLY hurts, and almost pounds like a horrible bruise. I know I don't have a bruise there, and i'm starting to worry that it's something serious, I noticed it last night. Any Help? Thank You!