Having headache each and every time what could be the reason behind that?

Many possibilities: 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... Over-the-counter treatments include Tylenol, Motrin, Aleve, Excedrin, and their generics. A bad or increasing headache, recurrent headache (as in this case), weird headache, or one with other worrisome symptoms should be checked by one's doctor.