Young people can have mental, emotional, and behavioral problems that are real, painful, and costly. These problems, often called "disorders," are sources of stress for children and their families, schools, and communities. Mental health disorders in children and adolescents are caused by biology, environment, or a combination of the two. Examples of biological factors are genetics, chemical imbalances in the body, and damage to the central nervous system, such as a head injury at any time of ch