DSM-IV-TR Diagnostic and Statistical Manual of Mental Disorders Fourth Edition, Text Revision
The scientific study of psychological disorders is called abnormal psychology or psychopathology. It focuses on understanding the nature, causes, and treatments of mental disorders. This field helps researchers and clinicians better understand and address various psychological issues.
Psychosomatic disorders. These conditions involve physical symptoms that are influenced by psychological factors such as stress, anxiety, or emotional distress. They can manifest in various ways including somatic symptoms, pain disorders, or medically unexplained symptoms.
The diagnosis you're looking for is: Munchausen's - Münchausen syndrome is a term for psychiatric disorders known as factitious disorders wherein those affected feign disease, illness, or psychological trauma in order to draw attention or sympathy to themselves
In general, these disorders are called autoimmune disorders.
the study of eating disorders
Dewey decimal The classification system used in libraries is called the DEWEY Decimal Classification System. I hope this helped!
Taxonomist. The study of classification is called taxonomy.
Geographical
Scientific Classification or simply "Classification."
classification
Diagnostic and Statistical Manual of Mental Disorders.
A dermatologist diagnoses and cares for people with skin disorders.