Why do I have headaches?

Overview

Headaches can have many causes, ranging from minor to serious. Common causes include tension (from stress, poor posture, or muscle tightness), migraines (often accompanied by sensitivity to light and nausea), sinus pressure (from allergies or infections), dehydration, lack of sleep, skipped meals, and eye strain. Less common but serious causes include high blood pressure, brain tumors, and meningitis. To manage headaches, identify triggers by keeping a headache diary, practice relaxation techniques, stay hydrated, get enough sleep, and maintain good posture. Over-the-counter pain relievers can help with mild headaches. Seek medical attention for severe, sudden headaches, headaches accompanied by neurological symptoms, or persistent headaches that don't respond to treatment.

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