Agoraphobia is primarily characterized by intense anxiety or fear related to situations from which escape might be difficult, or help might not be available, should panic-like symptoms or other incapacitating or embarrassing symptoms develop. Individuals with agoraphobia commonly experience distress in situations such as: Being in crowds or standing in lines; Using public transportation; Being in enclosed spaces like restaurants or movie theaters; Attending appointments (especially in unfamiliar settings). When confronted with these situations, individuals often experience a range of physical and psychological anxiety symptoms, which can vary greatly from person to person. These symptoms may include: Rapid heart rate; Feelings of dread or terror; Sleep disturbances and fatigue; Difficulty concentrating; Excessive sweating; Dry mouth; Shortness of breath; Chest pain; Trembling or shaking; Nausea and diarrhea; An overwhelming urge to escape the current situation; Dizziness or lightheadedness; Difficulty swallowing; Feeling faint or like one might collapse; Fear of dying.