Social anxiety disorder causes intense worry regarding any social situation and affects your ability to enjoy these experiences. You might criticize and dwell on your actions long after the event ends. Often, people with social anxiety disorder have difficulties maintaining relationships. They excessively worry about saying or doing something embarrassing in front of others. Sometimes, social anxiety can be so severe they may avoid any situation where they must interact with others, such as school, work or gatherings. This behavior often leads to isolation and even depression.