Social anxiety disorder is a wider category than social phobia (feeling intensive fear and discomfort in social situation).
SAD is a persistent fear of social or performance situations in which the person is exposed to unfamiliar people. For example the person during a conversation feels so uncomfortable that one is unable to talk to others. In other cases the person is unable to go out to dinner because having fear of being watched eating.
The feared situations provoke anxiety or situational panic attack.
The person recognizes that this fear is unreasonable or excessive.
The person suffers significant distress and impairment.
The avoidance, anxious anticipation, or distress in the feared social or performance situation interferes with his or her normal routine occupational functioning, or social and everyday activities or relationships.
The symptoms must be persistent lasting six or more months.
Social anxiety disorder is treated generally cognitive behavioral therapy. Medications can be necessary.
Focus therapy or Emotionally Focused Therapy are also effective.