Social anxiety disorder, also known as social phobia, is a common anxiety disorder that affects many people. People with social anxiety have excessive and unreasonable fears before and during different social situations. With a social anxiety disorder, normal, everyday interactions may cause feelings of anxiety, nervousness, self-consciousness and embarrassment. Individuals who suffer from social phobia may avoid certain social situations because of the overwhelming fear and anxiety that these situations may cause. The anxiety and emotional discomfort caused by a social anxiety disorder may interfere with daily routines, relationships, school or employment.