Headaches are very common and result from irritation to the pain sensing structures of the head, upper neck, and face. Almost half of the population complains of some level of recurrent headaches during their lifetime, however most of these are treated with over the counter remedies and are not seen by physicians.
If you have a new onset headache that starts under the age of 5 or over the age of 50 you should be evaluated by a physician. You should also be evaluated if your headache pattern changes suddenly, if you have changes in vision, fever, weight loss, or if you lose sensation or function in any areas of your body. These could indicate an underlying disease process that needs to be diagnosed and treated.
The majority of headaches are considered tension headaches or migraine headaches. Tension headaches are mild to moderate in intensity, are typically on both sides of the head, and feel like a tightness around your head. Migraine headaches are usually more severe in intensity, usually on one side, and associated with nausea, vomiting, sensitivity to light or sound, and/or aura.
Both of these headaches involve irritation to the pain sensitive structures of the head and neck including muscles at the base of the skull, the membranes of the head and neck, arteries, and dural sinuses. Various things can make the pain sensing fibers more sensitive than normal: lack of sleep, hormone changes, food sensitivities, withdrawal from caffeine or medication, and stress.