Neurosis is a mental health problem best defined as a spectrum of personalities that have exceeded their natural inclination and temperament, giving way to obsession with certain thought processes. Psychosis refers to a personality's break from reality.
Anyone can suffer from a neurosis, but psychoses are much more rare. Those suffering from a neurosis are often more likely to be able to lead a normal social life. Neurosis is an umbrella term that encompasses disorders ranging from anxiety and depression to obsessive-compulsive disorders. The term "neurotic" is no longer used by the psychiatric world, as medical professionals often call these issues generalized anxiety disorders. Psychoses typically persist throughout a person's life and are usually divided into schizophrenic and manic-depressive disorders.