What is the definition or description of: headache and fever?

Potentially a risk: Fever can be associated with headache, but fever, headache, and stiff neck might be associated with meningitis. So, nonspecific signs, clustered together may lead a clinician to a diagnosis.

See below: A headache or cephalalgia is pain anywhere in the region of the head or neck. It can be a symptom of a number of different conditions of the head and neck fever (also known as pyrexiais one of the most common medical signs and is characterized by an elevation of body temperature above the normal range of 36.5–37.5 °c (98–100 °f) due to an increase in the temperature regulatory set-point.