Body Dysmorphic Disorder
Body Dysmorphic Disorder is the preoccupation with an imagined or exaggerated defect in physical appearance.
The disorder tends to occur in young adults. Sufferers may persistently seek medical attention to fix the defect surgically. Some do well with surgery, while others remain preoccupied and dissatisfied with their appearance. Severe preoccupation causes clinically important distress or impairs work, social or personal functioning.
See DSM-IV-TR 300.7 Body Dysmorphic Disorder