Please check first
A headache that suddenly becomes severe like a thunderclap, a severe headache of a kind you have never had before, or a headache that comes with fever, neck stiffness, reduced consciousness, weakness in the arms or legs, or slurred speech may have a cause that needs care immediately. In that case, do not rely on this page — go to the emergency room right away.
A headache that newly appears after age 50, a headache that keeps getting worse, a headache in someone with a history of cancer or reduced immunity, or a headache that worsens with coughing or a change of posture needs its cause confirmed first with imaging or other tests.
