Can any doc tell me what's social anxitey disorder please?

Social anxiety: Shows itself in many forms. You may find it difficult to be around people, especially crowds. It may be that you find it difficult to eat or use many rest rooms. We are essentially very focused on what people think of us and not measuring up. We all have a bit of this but social anxiety takes it to a point where it interferes w/social life, going out, and social life in general. The very best.