One anxiety causer that relates to a large amount of people would be having a social phobia. Very few people are comfortable walking into a room where they know no one and start talking to total strangers. Or getting up in front of a stage and teaching or preforming in some way. The reactions are normally the same for everyone, you start to get a dry mouth your palms get sweaty your mind forgets everything you just practiced. These would be mild reactions to a social phobia some people start to get hives or even pass out from their anxiety attacks.
There are a couple was to treat anxiety related to social phobia. The first one is to train people who lack the social skills in conversations, communicating their needs, or meeting the needs of others socially. By training them how to handle certain situations by exposing them to different scenarios it will bring their confidence up and their anxiety down to a level that they can control.
The second way to treat anxiety disorder related to social phobia would be to use a proscribed psychotropic medication for the patient (Julien, 2008). Antidepressant medications can reduce the symptoms of people suffering from a social phobia.
In an interview in 2006 with Oprah Winfrey, Barbra Streisand revealed that she had begun taking anti-anxiety medication in a bid to once again get her stage fright under control. Previously it had been reported that she had received therapy from Jerilyn Ross, president and CEO of the Anxiety Disorders Association of America -- the same therapist who later treated Donny Osmond. Barbra continues to use Teleprompters as an aid to help mitigate some of her anxiety about performing.