Cabin Fever is a colloquial term used to describe the reaction when trapped somewhere for an extended period of time. It can be used to describe being metaphorically trapped (like in a toxic relationship) or actually trapped (like being in a cabin covered in snow during an avalanche, which is where the name comes from). The most similar clinical concept would be claustrophobia, which is an anxiety condition marked by a feeling of no escape and fear of small spaces. Symptoms of cabin fever can include restlessness, frustration, sleep disturbances, irritability, distrust of others and urge to escape.