Hello
This could be as simple as dehydration, or as severe as a brain tumor, with other things in between. It could be high blood pressure as well.
Your best bet is having diagnostic tests done at the doctor.
In the mean time try some excedrin (caffeine), and increase your fluid intake and see if that helps.
Kerry
Kerry, RN
Please click the accept button if this has helped you. A bonus is always appreciated as well.