A headache is pain or discomfort felt in the head, scalp, or neck area. It is a very common condition and can affect children, adolescents, and adults. Headaches can occur occasionally or repeatedly and may vary from mild to severe.
Headaches may be caused by stress, lack of sleep, eye strain, dehydration, infections, sinus problems, or underlying medical conditions. Most headaches are not serious, but frequent or severe headaches may require medical evaluation.
