Whether there is a real difference between neurosis and psychosis, the main part of clinical psychology is the diagnosis and treatment of mental disorders. This is often difficult and controversial as many diseases may be confused with other diseases; there is always a clear guideline to follow. An example of this confusion can be seen in neurosis and psychosis. Neurosis and psychosis are not major categories in the Diagnostic and Statistical Manual of Mental Disorders (DSM - III).
Psychosis means that you can not distinguish between real things and not. Mental illness consists of two parts. The first part is to see and hear what does not exist. Most people with mental illness hear unreal sounds and sounds. The second part of mental illness is a firm belief in what is impossible. For example, you might think that you have special power and you may believe others can read your thoughts. Eating disorders may change your awareness of food and body. You may believe that you are bigger than you actually are. If you are thinner, you may think you will get better. Some people with eating disorders are not well healthy. Other people eat a lot at once and remove food from their bodies
In 1841, Carl Friedrich Kanstadt introduced the term psychiatry to psychiatry literature in his book "Handbuch der Medizinischen Klinik". He used it as an abbreviation for "mental disorder". At the time, neurosis means all diseases of the nervous system, so Canstatt means psychological symptoms of brain diseases. Ernst von Feuchtersleben is also widely considered to have introduced this term in 1845 instead of madness and fanatics. This term is also used to distinguish between states considered as mental disorders, as opposed to neurosis regarded as a neurological disorder. Therefore, psychiatric disorders become modern equivalent to the old concept of crazy. Therefore, there are many arguments about whether there is a single (single) or multiple forms of new disease. After that, the widely used usage method in 1891 was narrowed down to "psychotic recessive" by Koch, and later changed to a personality changed by Schneider.