The number of families who are affected by mental, emotional, and behavior disorders in young people is staggering. It is estimated that as many as one in five children or adolescents may have a mental health problem that can be identified and treated. At least 1 in 10-or as many as 6 million young people-may have a "serious emotional disturbance." This term refers to a mental health problem that severely disrupts a person's ability to function socially, academically, and emotionally.

Mental health disorders in children and adolescents are caused by biology, environment, or a mix of both. Examples of biological factors are genetics, chemical imbalances in the body, and damage to the central nervous system, such as a head injury. Many factors in a young person's environment can affect his or her mental health, such as exposure to violence, extreme stress, and loss of an important person.

Caring families and communities working together can help children and adolescents with mental disorders. A broad range of services often is necessary to meet the needs of these young people and families.