The cluster headache is a malady that affects just 69 out of 100,000 people in the population-much fewer than those who suffer from migraines, sinus headaches, or one of the many other types of headaches. This is probably why it was not really recognized by the medical community until the last 150 years or so and is still largely misunderstood. One of the earliest known mentions of the cluster headache was by von Mollendorff in 1867. In 1956, Sir Charles Symonds gave a more complete account which helped to educate the general public about this little known malady. Over the course of time there have been many different names attributed to these headaches including erythroprosopalgia, spenopalatine neuralgia, ciliary neuralgia, Rader