Cluster headaches affect one side of the head (unilateral) and may be associated with tearing of the eyes and nasal congestion.  They occur in clusters, happening repeatedly every day at the same time for several weeks and then remitting.  Cluster headaches are a fairly common form of chronic, recurrent headache.  Unlike migraines, they affect men more often than women.  They can affect people of any age but are most common between adolescence and middle age.  There does not seem to be a pattern among families in the development of cluster headaches.  Cluster headaches occur as a severe, sudden headache.  The onset is sudden, and it occurs most commonly during the dreaming (REM) phase of sleep.  Cluster headaches may occur daily for months, alternating with periods without headaches (episodic), or they can occur for a year or more without stopping (chronic).  A person may experience alternating chronic and episodic phases.

Chiropractic focuses on maintaining the correct structure of the spine. When the spinal bones are in correct position, the muscles that support the head are relieved of stress and spasms. Both the relaxation of the muscles in the back and the correct alignment of the spinal bones, relieve the spinal nerves of the pressure and allow the correct flow of energy through the nerves.