body dysmorphic disorder

noun
variants: also body dysmorphia

Medical Definition of body dysmorphic disorder

: pathological preoccupation with an imagined or slight physical defect of one's body to the point of causing significant stress or behavioral impairment in several areas (as work and personal relationships) People suffering from body dysmorphic disorder perceive themselves as ugly, fixating on a slight abnormality or an imagined flaw.— Charles Q. Choi, Scientific American, February 2008