I am getting a sharp quick pain on the upper left side of my head, it doesn't last long (feels like someone takes a hammer and hammers a nail in my head, goes away, and about a minute later happens again.) I have had this before but it never lasted; I've had this now for about a week. I am on no medication and otherwise healthy. Any ideas?
Per the Migraine specialists we work with, any time we have new or different symptoms it is important to discuss them with our doctor. Now, having said that if they last only seconds, they could be ice pick headaches. You can read more about ice pick headaches in Ice Pick Headaches - The Basics.
But what is really important here is that you could be describing any number of things - some harmless, some not so harmless. The only person who can safely tell you what is going on is your doctor. He/she can review your and your family's medical history, discuss your symptoms with you, and conduct a complete examination. Nobody can diagnose via the Internet; it just isn't safe.
Unexplained head pain should always be checked out. Please see your doctor and let us know what he or she says?
You might also check out these sites:
Types of Migraines and Headaches
10 Tips for Avoiding Migraines This Summer