Starting yesterday I have had a very strange sensation on the very top, center of my head. There is a spot that feels as if it s pulsing, right beneath the scalp. If I scratch it, or rub it, it tingles and feels numb. (No pain) Is this some sort of scalp/skin issue, or soemthing more serious? (I m 37 yo female, 5 6 , no recent head trauma; first migraine about a month ago; Hashimotos; recent bout of inflamation in the retina of my left eye)