PTSD is also associated with blunted affect, which may be due to the high comorbidity with depression. Parkinsons disease
Anhedonia occurs frequently in Parkinsons disease, with rates between 7%–45% being reported. Whether or not anhedonia is related to the high rates of depression in Parkinsons disease is unknown. Bipolar depression
Anhedonia is also reported to appear in people with bipolar depression. Attention deficit hyperactivity disorder
Anhedonia may be associated with ADHD. Impairments of dopaminergic and serotonergic function in the brain of those with ADHD result in dysregulation of reward processing which can lead to anhedonia. Sexual anhedonia
Sexual anhedonia in males is also known as ejaculatory anhedonia. This condition means that the man will ejaculate with no accompanying sense of pleasure.The condition is most frequently found in males, but women can experience lack of pleasure when the body goes through the orgasm process as well. Sexual anhedonia may be caused by:

Hyperprolactinaemia
Hypoactive sexual desire disorder (HSDD), also called inhibited sexual desire
Low levels of the hormone testosterone
Spinal cord injury
Multiple sclerosis
Use of SSRI antidepressants or having used SSRI antidepressants in the past. Use (or previous use) of antidopaminergic neuroleptics (anti-psychotics)
Fatigue
Physical illnessIt is very uncommon that a neurological examination and blood tests can determine the cause of a specific case of sexual anhedonia. Patients may be prescribed sustained-release bupropion to aid in treatment, which has been shown to relieve sexual dysfunction even in patients without depression. Social anhedonia
Definition
Social anhedonia is defined as a disinterest in social contact and a lack of pleasure in social situations, and is characterized by social withdrawal.
The efforts of the "social processes" RDoC initiative will be crucial in differentiating between these components of social behavior that may underlie mental illnesses such as schizophrenia. Primary relevance in schizophrenia and schizophrenia spectrum disorders
Social anhedonia is a core characteristic of schizotypy, which is defined as a continuum of personality traits that can range from normal to disordered and contributes to risk for psychosis and schizophrenia. Social anhedonia is a dimension of both negative and positive schizotypy. It involves social and interpersonal deficits, but is also associated with cognitive slippage and disorganized speech, both of which fall into the category of positive schizotypy. Not all people with schizophrenia display social anhedonia and likewise, people who have social anhedonia may never be diagnosed with a schizophrenia-spectrum disorder if they do not have the positive and cognitive symptoms that are most frequently associated with most schizophrenia-spectrum disorders.Social anhedonia may be a valid predictor of future schizophrenia-spectrum disorders; young adults with social anhedonia perform in a similar direction to schizophrenia patients in tests of cognition and social behavior, showing potential predictive validity. Social anhedonia usually manifests in adolescence, possibly because of a combination of the occurrence of critical neuronal development and synaptic pruning of brain regions important for social behavior and environmental changes, when adolescents are in the process of becoming individuals and gaining more independence. Treatment
There is no validated treatment for social anhedonia.