There are some severe health conditions that may cause frequent headaches and that is strokes, meningitis, blood pressure and some brain tumors. Migraine is another cause for frequent headaches, but it also causes light sensitivity, nausea and vomiting. Migraine is a chronic illness and if you suspect you are suffering from it, seek professional advice to get proper treatment for migraine. There are many other causes for frequent headache and you should see your doctor to rule out other causes and point out the real reason for your pain. Your doctor will order some exams and perform an extensive physical examination.