By Illness & Population

Mental health disorders are medical conditions that disrupt a person’s thinking, feeling, mood, ability to relate to others, and daily functioning. Just as diabetes is a disorder of the pancreas, mental illnesses are medical conditions of the brain that often result in a diminished capacity for coping with the ordinary demands of life.

Serious mental illnesses include major depressionschizophreniabipolar disorderobsessive compulsive disorder (OCD)panic disorder, and post traumatic stress disorder (PTSD). The good news about mental illness is that recovery is possible.

Mental illnesses can affect persons of any age, race, religion, or income. Mental health disorders are not the result of personal weakness, lack of character, or poor upbringing. Mental illnesses are treatable. Most people diagnosed with a serious mental illness can experience relief from their symptoms by actively participating in an individual treatment plan.

Mental illness is thought to be caused by a combination of biological, psychological, and environmental factors.

To learn more about a specific disorder, click the links below:

Anxiety Disorders 

Dual Diagnosis or Co-occurring Disorders 

Mood Disorders

Psychotic Disorders 

Other Mental Health Topics

To learn more about a population, click the links below:

Infant and Early Childhood 

Children and Adolescents 

Young Adults


Older Adults

Visit our FAQs page for additional information.