Cluster headaches are among the most severe headache disorders. Cluster headache attacks occur with the greatest pain intensity on one side of the eye area. They are among the most severe pains that afflict people. Those affected are still considered the stepchildren of medicine. In recent years, initiatives by the national association of cluster headache self-help groups CSG eV made it possible to achieve a better level of information and analyzes of the needs of those affected and their relatives.