Marlee..I get that kind of sensation when I notice I have been clenching my teeth, or grinding them in my sleep. The muscle at my temple will also twitch. It feels like an electrical jolt. The dentist told me some kind of nerve (do I remember which one...no!) runs through the jaw and into all areas of the head and face and when you clench your teeth it becomes irritated. Don't know if that's what's going on with you, but I have felt it before too. ZAP!