How is mental illness defined?

Mental illness is defined as a disorder of thought, mood, or behavior that is often characterized by significant disruptions in psychological functioning. This definition emphasizes that mental illnesses are not merely temporary states or reactions to life events but rather conditions that can be diagnosed based on specific criteria.

The focus on "disorder" highlights that these conditions typically involve persistent issues that affect a person’s ability to cope with daily life, make decisions, relate to others, or perform in social, occupational, or personal domains. The statement also indicates that these disorders can occur independently of other causes, including medical or environmental factors, which aligns with established definitions used by mental health professionals.

Understanding mental illness in this way allows for a more comprehensive approach to treatment and support, recognizing that these conditions require attention and care similar to physical illnesses.