Can you tell me why i am having on going headache been going on for awhile now.

Many possibilities: Most people get a headache at some time, such as from colds, infections, lack of sleep, too much driving, long hours on the computer, stress at work, etc... Over-the-counter drug options include tylenol, (acetaminophen) motrin/advil, alleve, excedrinmigraine, and their generic brands. A bad or increasing headache, recurrent headache, weird headache, or one with other worrisome symptoms must be seen by a doctor.