Why Do I Have a Constant Headache That Won''t Go Away?

Persistent headaches lasting more than 15 days per month can indicate underlying conditions requiring medical evaluation. Common causes include medication overuse headaches affecting 1-2% of the population, tension headaches from stress or poor posture, migraines with neurological triggers, or secondary headaches from high blood pressure, sleep disorders, or hormonal changes. Dehydration, eye strain from screen time, or caffeine withdrawal can also perpetuate daily headaches. Red flag symptoms include sudden severe pain, fever, vision changes, or neck stiffness, which warrant immediate medical attention. A headache diary tracking triggers, timing, and severity helps identify patterns and guide treatment decisions.