Anxiety disorders are characterized by excessive and abnormal anxiety that interferes with daily functioning. Symptoms can include physical features like increased heart rate and sweating, behavioral avoidance, and worrying or irrational thoughts. The main types of anxiety disorders are panic disorder, phobic disorders like social anxiety disorder and agoraphobia, and generalized anxiety disorder. Panic disorder involves unexpected panic attacks, while phobias involve excessive and irrational fears of specific objects or situations. Cognitive behavioral therapy helps patients address unhelpful thoughts and behaviors associated with their anxiety disorders.