Fear is defined as an excessive or unreasonable response to a specific object or situation that almost always provokes anxiety or panic. Phobias are learned through psychoanalytic, learning, and cognitive theories. Phobias are classified including agoraphobia, social phobia, and specific phobias of animals, natural environments, medical procedures, and situations. Diagnosis is based on history and symptoms of anxiety when exposed. Treatment includes antidepressants, benzodiazepines, and psychotherapies like behavior therapy and cognitive therapy.