I have been experiencing sharp pain on the right side of my head that comes and goes. It stays for a length of time, though sometimes it goes away quickly. What could this be?
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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.
What you describe could be any number of things; some harmless, some not so harmless. The only person who really answer your question is a doctor who can review your and your family's medical history, discuss your symptoms with you, and conduct a complete examination. It's impossible to diagnose via the Internet.
Unexplained head pain should always be checked out. Please see your doctor and let us know what he or she says?