Anhedonia

Anhedonia is the inability to derive pleasure from most activities such as, eating, exercise, and social or sexual interaction.

Anhedonia is recognized as one of the key symptoms of depression according to the Diagnostic and Statistical Manual of Mental Disorders Fourth Edition (DSM IV) and the International Statistical Classification of Diseases and Related Health Problems (ICD).

Anhedonia is also seen in schizophrenia, schizoaffective disorder, schizoid personality disorder and other mental disorders.