MedGen

Extreme, irrational, and persistent fears of certain objects, situations, activities, or persons can impede functioning in day-to-day life. [from HPO]

A personality disorder is a deeply ingrained pattern of behavior of a specified kind that deviates markedly from the norms of generally accepted behavior. It is typically apparent by the time of adolescence and causes long-term difficulties in personal relationships or functioning in society. [from HPO]

An anxiety disorder characterized by an intense, irrational fear of one or more social or performance situations in which the individual believes that he or she will be scrutinized by others. Exposure to social situations immediately provokes an anxiety response. In adults, the social phobia is recognized as excessive or unreasonable. [from NCI]

A disorder characterized by an enduring pattern of avoidance of social situations and interpersonal contact due to overwhelming feelings of social inadequacy and a hypersensitivity to negative evaluation or rejection. [from NCI]