Claustrophobia

Claustrophobia (from Latin claustrum "a shut in place" and Greek φόβος, phóbos, "fear") is the fear of having no escape and being closed in small spaces or rooms (opposite: claustrophilia). It is typically classified as an anxiety disorder and often results in panic attack, and can be the result of many situations or stimuli, including elevators crowded to capacity, windowless rooms, and even tight-necked clothing. The onset of claustrophobia has been attributed to many factors, including a reduction in the size of the amygdala, classical conditioning, or a genetic predisposition to fear small spaces.