what is a cluster headache
Cluster headache is pain that occurs along one side of the head. It's frequently described as pain that occurs around, behind, or above the eye and along the temple in cyclic patterns or clusters. The pain of a cluster headache is very severe.Many patients describe a âdrillingâ type of sensation.luster Headache Symptoms. A headache is a pain in the head with the pain being above the eyes or the ears, behind the head (occipital), or in the back of the upper neck.