Social anxiety disorder, also known as social phobia, is one of the most pr
evalent anxiety disorders, affecting 7-13% of subjects in the community at
same time in their lives. Despite being eminently treatable, it remains lar
gely under-recognised and, therefore, undertreated. The disorder is charact
erized by a fear of scrutiny by others, with sufferers experiencing excessi
ve anxiety in social and performance situations. This excessive anxiety usu
ally leads to avoidance behaviour that can severely affect normal daily liv
ing. With onset commonly occurring during childhood or adolescence, social
anxiety disorder may disrupt normal patterns of development of social and p
ersonal relationships, often having a long-term impact on emotional stabili
ty in social or working life. If left untreated, the course of social anxie
ty disorder is frequently complicated,vith comorbid conditions, particularl
y major depression or substance abuse. This review assesses the size of the
clinical problem by evaluating current and lifetime prevalence estimates,
age of onset, risk factors and evolution of the clinical course; thereby pr
oviding the rationale for early recognition and prompt treatment. Int Clin
Psychopharmacol 15 (suppl 1):S7-S12 (C) 2000 Lippincott Williams & Wilkins.