The past few days I've had re-occuring sharp pain on the left side of my head, near the temple area for the most part. It comes & goes and only lasts for a second or two as the sharp pain just shoots around my temple area and leaves, almost pulse-like. It happens about once every 30 minutes to an hour. I haven't had any recent head trauma and I've never had any kind of head pain quite like this, so I'm concerned as to what it is.