Headaches and Migraines What Are Cluster Headaches? Share Pin Email Headaches and Migraines Migraine Symptoms Basics Diagnosis Treatment Coping Understanding Migraines Updated April 06, 2016 What exactly is a cluster headache? This is what to look for. Up Next Up Next Video What Are Symptoms of Cluster Headaches? Up Next Video What Are Primary Headaches? Up Next Video Difference Between a Headache and a Migraine Up Next Video What's a Tension Headache?