A headache is a pain or discomfort in the head or neck region that can be caused by a variety of factors, including stress, tension, dehydration, sinus congestion, medication side effects, and medical conditions such as migraines. Headaches can range in severity from mild to severe and may be accompanied by other symptoms such as nausea, sensitivity to light or sound, and fatigue. Treatment for headaches depends on the underlying cause and may involve medication, lifestyle changes, or other interventions to alleviate symptoms and prevent complications.
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