Cranial autonomic symptoms are symptoms that affect the cranium or skull, which occur due to a response of the autonomic nervous system. This is a division of the nervous system that controls involuntary actions. Typical autonomic symptoms of the cranium include teary eyes, runny or congested nose, and sweating on the face or forehead. These symptoms often accompany other health conditions. For example, at least one symptom always accompanies cluster headaches.
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