why do we have headache
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Answer:
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Explanation:
vessels, and muscles that cover a person's head and neck. Sometimes the muscles or blood vessels swell, tighten, or go through other changes that stimulate the surrounding nerves or put pressure on them.
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In some cases, headaches can result from a blow to the head or, rarely, a sign of a more serious medical problem. Stress. Emotional stress and depression as well as alcohol use, skipping meals, changes in sleep patterns, and taking too much medication. Other causes include neck or back strain due to poor posture.