Hello, Let me tell you that a given problem can be due to various causes and similarly headache can be due to many causes like brain tumor,brain infection, problems in the blood vessels in the brain, migraine, cluster headache. Another important thing to note that the presence or absence of certain complaints like fever, vomiting, eye pain, redness of eyes, tearing from one or both eyes, visual symptoms, weakness of hands, legs, difficulty in speaking etc will help us narrow down the possibility. Further age, gender, body weight and family history are important. I have noted your complaints. In the absence of these data i am suspecting two problems 1. Migraine 2. You may have sleep apnea- which can cause headache A detailed interview and clinical examination by a neurologist is required in your case. A detailed interview will clarify so many things as i have described above. This will tell us if a brain scan is required or not. All these exercises is to pin point the diagnosis and then treat rather than simple assumption in the current era of evidence- based medicine. If there is sleep apnea the treatment is entirely different Hope this will guide you better