First a brief overview of anxiety and related conditions. What is Clinical Anxiety? Clinical anxiety in its various forms boils down to the overwhelming, persistent, and disruptive form of the ‘fight or flight’ mechanism in the brain. The climax of this disorder is normally an anxiety attack (also called a panic attack). Depending upon the type of anxiety you may have, anxiety attacks may or may not be able to be detected before the onset. One of the most frustrating aspects of this disorder is the inability to express to others what is wrong before diagnosis in most cases.