Headache can be due to a lot of reasons. We need to know a few more facts from your before narrowing down on the diagnosis. Where is this headache - Front, Back or On Sides Which Side - Right, Left or Both Sides, Which Time of the day it is more Any specific Triggering factors Any Specific Relieving factors Is that associated with Nausea and / or vomiting Have you done any test Have you taken any treatment

Can't diagnose without examining the patient.