The International Headache Classification of Headache Disorders. Hadache attributed to infecton.

Headache is a common accompaniment of systemic viral infections such as influenza. It si also common with sepsis; more rarely it may accompany other systemic infections. In intracranial infections headache is usually the first and the most frequently encountered symptom. Occurrence of a new type of headache which is diffuse, pulsating and associated with a general feeling of illness and / or fever should direct attention towards an intracranial infection even in the absence of a stiff neck. Unfortunately there are no good prospective studies of the headaches associated with intracranial infection and precise diagnostic criteria for these subtypes of headache cannot be developed in all cases.