The Secondary Headaches · ICHD-3 · 9

Infection

From influenza to meningitis and abscess. Headache with fever is common and often benign, but fever with neck stiffness, a rash, falling consciousness, or a focal sign is an emergency path.

Intracranial infection

Meningitis, encephalitis, and abscess are emergencies. Starting antimicrobials and the lumbar-puncture decision, before every result is back, follow hospital protocol and are not prescribed on this page. For the generalist, the task is to recognise the ill person and not send them home labelled as migraine.

These pages are written for health professionals. They do not replace a history, examination, or clinical judgment. Treatment is decided for each patient individually.