Over-the-counter remedies that may reduce headache pain include aspirin, acetaminophen and ibuprofen. Resting in a darkened room may also help. Dengue fever warning: If you think you might have dengue fever, see a doctor and avoid taking aspirin or ibuprofen. SEEKING MEDICAL CARE See a doctor immediately if you Feel worse than usual Get a sudden, severe headache Become confused, slur your speech, or faint Have one-sided numbness or paralysis, or trouble seeing, speaking, or walking Develop a fever higher than 102°F (39°C) Experience nausea or vomiting Make an appointment to see a doctor if you Start having frequent headaches Are getting worse over time Can't work, sleep or do daily activities Don't improve with self-treatment