Cluster headaches may be caused by blood vessel dilation in the eye
area. Inflammation of nearby nerves may give rise to the
distinctive stabbing, throbbing pain usually felt in one eye. The
trigeminal nerves branch off the brainstem behind the eyes and send
impulses throughout the cranium and face.
Review Date: 09/28/2005
Reviewed By: A.D.A.M. Medical Illustration Team
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)
