Claustrophobia is an intense FEAR of enclosed spaces. It is an anxiety disorder that can cause panic attacks, difficulty breathing, and a feeling of being trapped. People with claustrophobia may experience physical symptoms such as sweating, trembling, and a racing heart. They may also experience psychological symptoms such as FEAR, dread, and a sense of impending doom. Treatment for claustrophobia typically involves cognitive-behavioral therapy, relaxation techniques, and medications.