One type is also known as agoraphobia.
Social Phobia, or Social Anxiety Disorder, is an anxiety disorder characterized by overwhelming anxiety and excessive self-consciousness in everyday social situations. Social phobia can be limited to only one type of situation — such as a fear of speaking in formal or informal situations, or eating or drinking in front of others — or, in its most severe form, may be so broad that a person experiences symptoms almost anytime they are around other people.
Signs & Symptoms
People with social phobia have a persistent, intense, and chronic fear of being watched and judged by others and being embarrassed or humiliated by their own actions. Their fear may be so severe that it interferes with work or school, and other ordinary activities. Physical symptoms often accompany the intense anxiety of social phobia and include blushing, profuse sweating, trembling, nausea, and difficulty talking. (http://www.nimh.nih.gov/health/topics/social-phobia-social-anxiety-disorder/index.shtml)