Social Anxiety Disorder;Fear of social situations in which the person is exposed to unfamiliar people or to possible scrutiny by others. The individual fears that he or she will act in a way (or show anxiety symptoms) that will be embarrassing and humiliating, often times leading to avoidance of social situations and severe distress when participation in social situations can't be avoided. 
Nevertheless, if you are struggling with symptoms of an anxiety disorder it is not uncommon to feel alone and misunderstood. Because the fear that people with an anxiety disorder have is not experienced by others, they may not understand why, for example, being in a crowd of people, not being able to wash your hands after meeting a new person, or driving through the street where you got in a car accident can be really anxiety-provoking for someone with an anxiety disorder. People may comment that "there is no reason to worry about it" or that you "should just let it go".
Paula had her next panic attack three weeks later, and since then, they’ve been occurring with increasing frequency. She never knows when or where she’ll suffer an attack, but she’s afraid of having one in public. Consequently, she’s been staying home after work, rather than going out with friends. She also refuses to ride the elevator up to her 12th floor office out of fear of being trapped if she has a panic attack.
Agoraphobia: This is a fear and avoidance of places, events, or situations from which it may be difficult to escape or in which help would not be available if a person becomes trapped. People often misunderstand this condition as a phobia of open spaces and the outdoors, but it is not so simple. A person with agoraphobia may have a fear of leaving home or using elevators and public transport.
Social anxiety disorder (previously called social phobia): People with social anxiety disorder have a general intense fear of, or anxiety toward, social or performance situations. They worry that actions or behaviors associated with their anxiety will be negatively evaluated by others, leading them to feel embarrassed. This worry often causes people with social anxiety to avoid social situations. Social anxiety disorder can manifest in a range of situations, such as within the workplace or the school environment.