Mental disorder: Initial

‧༺═────── What's a Mental disorder ──────═༻

An aspect of mental health. A mental disorder, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. Characterized by a clinically significant disturbance in an individual's cognition, emotional regulation, or behavior, often in a social context.

‧༺═────── Categories of Mental disorder ──────═༻

Mood disorder

Other affective (emotion/mood) processes can also become disordered. Mood disorder involving unusually intense and sustained sadness, melancholia, or despair is known as major depression.

Psychotic disorder
Patterns of belief, language use and perception of reality can become dysregulated. 

Personality disorder
Personality—the fundamental characteristics of a person that influence thoughts and behaviors across situations and time—may be considered disordered if judged to be abnormally rigid and maladaptive. 

Eating disorder
An eating disorder is a serious mental health condition that involves an unhealthy relationship with food and body image. They can cause severe physical and psychological problems.

Sleep disorder
Sleep disorders are associated with disruption to normal sleep patterns.

Sexuality related
Sexual disorders include various kinds of paraphilia (sexual arousal to objects, situations, or individuals that are considered abnormal or harmful to the person or others.)

Other

There are attempts to introduce a category of relational disorder, where the diagnosis is of a relationship rather than on any one individual in that relationship. The relationship may be between children and their parents, between couples, or others. There already exists, under the category of psychosis, a diagnosis of shared psychotic disorder where two or more individuals share a particular delusion because of their close relationship with each other.

‧༺═────── Source ──────═༻

https://en.wikipedia.org/wiki/Mental_disorder#