I have recently started to have very random extreme shots of pain occur in the top left side of my head. It only lasts 3 or 4 seconds, but when it occurs, I causes me to want to grasp my head and close my eyes until it goes away. It's very excrutiating. I have no had any type of head trauma and have not been under any type of stress. I am a female, 29 yrs old and recently had a physical before this started. I'm in excellent health and exercise at least 4 or 5 days a week. I am currently training for a half-marathon .... could the long running have anything to do with the pains I am experiencing? Also, I do not have migraines. Thanks so much for your help!