This is a very hard question to answer...ill start from the beginning. Isolation comes from personality disorder, szchophrenia, bipolar, and depression that I know of...anyways with anxiety there are certain types:

• Panic Disorder- Unpredictable attacks of anxiety that are accompanied by physiological manifestations. People with this disorder often undergo medical evaluations for symptoms related to heart attacks or other medical conditions before the diagnosis of panic disorder is made. Attacks may last from minutes to hours. An affected person often lives in fear of another attack and may be reluctant to be alone or far from medical assistance. Panic attacks can occur at any time, even during sleep. An attack generally peaks within 10 minutes, but some symptoms may last much longer.
• Agrophobia- An abnormal fear of being helpless in an embarrassing or inescapable situation that is characterized especially by the avoidance of open or public places. It may occur alone, or may accompany panic disorder. People with this disorder may become house bound for years, with resulting impairment of social and interpersonal relationships.
• Phobias- Persistent fear of objects or situations. When these situations or objects appear, they can produce immediate and severe symptoms of anxiety.
• Social Anxiety Disorder- A persistent irrational fear of situations in which the person may be closely watched and judged by others, as in public speaking, eating, or using public facilities. A person then becomes fearful of social or performance situations in which they may be subject to the scrutiny of others.
• Post Traumatic Stress Disorder- Post-traumatic stress disorder is a psychiatric illness that can occur following a traumatic event, in which there is the threat of injury or death to you or someone else.
• OCD- The person suffering from OCD uses ritualistic and repeated behaviors to rid themselves of obsessive thoughts and anxieties. Recent data show that 2-3% of people, or about 7 million Americans, suffer from this disorder.
• Generalized Anxiety Disorder - This a common condition. The disorder is characterized by excessive anxiety and worry that is out of proportion to the impact of the event or circumstance that is the focus of the worry. Persons with GAD may eventually experience other mental disorders, such as panic disorder or major depressive disorder.

Depression is pretty basic type wize. And bipolar and schizophrenia are in there own catigory. Now as for isolation...with depression people isolate to get away from the world mostly, anxiety is fear of crowds or just embarrassing yourself or panic attaks or voices tell you to leave, pchizophrenics have a different wayof thinking something might tell them to isolate and bipolars have different personalities meaning one personality might make them isolate along with personality disorders are like that..