Hello. Could you specify which area of the head is paining? Is there any associated nausea/ vomiting? Also if you could specify if headache is worsening on seeing any bright light/ hearing any loud noise. If not, headache could occur also in case of teeth problems/ sinus related problems.
Next Steps
Visit your physician to find the cause of headache. If it is due to a tooth issue, you will be referred to a dentist.