Cluster headache, nicknamed "suicide headache", is a neurological disease that involves, as its most prominent feature, excruciating pain. "Cluster" refers to the tendency of these headaches to occur periodically, with active periods interrupted by spontaneous remissions. The cause of the disease is currently unknown.
Sometimes called "alarm clock headache,"' Hynpic Headache is a is a rare primary headache disorder related to sleep. It develops only during the rapid eye movement (REM) stage of sleep and wakes the patient from sleep. Serotonin and melotonin dysregulation may play an important part in Hypnic Headache.
Hemicrania Continua is a trigeminal autonomic cephalalgia with symptoms are sometimes mistaken as Migraine. Unlike Migraine, which is made worse by movement, people with Hemicrania Continua are restless, agitated, and unable to be still during attacks. It is also characterized by severe pain and autonomic symptoms such as nasal congestion, runny nose, involuntary tears, eyelid drooping or swelling, and facial sweating.
Trigeminal autonomic cephalalgias are characterized by severe pain, nasal congestion, runny nose, involuntary tears, eyelid drooping, and more. One such TAC, paroxysmal hemicrania, is often overlooked. Its symptoms are similar to cluster headache, except attacks are shorter and more frequent.