I get headaches and dizziness almost all the times what is the possible cause?

Write down details: Most people get a headache at some time, such as from colds, infections, lack of sleep, too much driving, long hours on a computer, stress at work, etc... A bad or increasing headache, recurrent headache (as in this case), weird headache, or with other worrisome symptoms should be evaluated in-person. Show the headache diary of written details to the doctor during the evaluation.

See below : Are you drinking enough water ? 2 lt/day, this typically is the main cause of headaches.