Migraine is very disabling, which takes a toll on mood which can lead to depression and anxiety. As if living with the debilitating pain and other disturbing symptoms of chronic migraine wasn’t enough, combine it with a psychiatric disorder and quality of life drastically declines for many migraineurs. Comorbidity means two chronic diseases or conditions existing simultaneously in a patient.  Chronic migraine is often comorbid with psychiatric conditions such as depression, anxiety, post-traumatic stress disorder, personality disorders, and bipolar disorder....