Causes of headache range from simple headaches such as migrane type to very severe issues like brain tumor. So don't take it lightly...even if it is a simple case, taking paracetamol repeatedly is not the solution. I sugesst you to go to hospital....for now you can use the following questions to know whether your headache is simple case or not Is your headache accompanied by symptoms like fever, weight loss, fatigue, neck stiffness, skin rash? Have you noticed recent hearing, visual, and speech disturbances? Have you noticed a recent change in personality, consciousness, or mental status? Is your headache variable with position – changes with upright compared to laying down? Does your headache seem to get worse through time? Is your headache triggered by cough, exertion, orgasm?