Cluster Headaches are not killers - -they are not cancer or heart disease. However, there are secondary conditions that go along with CH. For example, I have Horner's Syndrome from my Chronic Cluster Headaches. I had four MRIs to determine that the Horner's was caused by CH and not something life-threatening. My vision is slightly impaired as a result. I would say that someone with CH can life a normal lifespan if they make a decision to not let the pain control their life and to keep living life to the fullest possible. Keep participating in studies about CH, be informed about new treatments, do not give up -- it is possible the scientists/doctors will one day figure this out.