Social anxiety can be defined as nervousness. Its really a source of concern 
Have you ever experienced it? It is really scary.
Social anxiety disorder
Social anxiety disorder (SAD), also known as social phobia, is an anxiety disorder characterized by a significant amount of fear in one or more social situations, causing considerable distress and impaired ability to function in at least some parts of daily life. These fears can be triggered by perceived or actual scrutiny from others. Individuals with social anxiety disorder fear negative evaluation from other people.
Physical symptoms often include excessive blushing, excess sweating, trembling, palpitations, and nausea. Stammering may be present,
really heard these tracks at all. Not like this. Forget bad dubs of worn-out 78s pressed on poor vinyl. The ‘reverse engineering’ transfers by Nicholas Bergh and subsequent restorations are so startlingly better, practically everything you will ever have experienced from this era can be discounted and CD is the best way to hear them. The clarity of group recordings where every instrument is well defined, and their instruments and voices suddenly sound real, will have you on the edge of your seat. And there’s none of