Internalized disorders are disorders of excessively controlled behavior directed at the individual. They can cause great difficulty in the functioning and adjustment of the child, but also significant mental difficulties in adulthood. Children and young people with internalized problems often cry, express fear, anger, are shy and lack a proper way of responding. It is important to learn and recognize the symptoms early in children and young people, because the sooner we discover, the greater the chance that these problems will be resolved faster and easier and have smaller consequences in later life. The three most common internalized problems in children and young people are childhood fears, social withdrawal, depression, and anxiety. The paper presents data on the prevalence of children and young people with internalized problems, as well as protective and risk factors that can reduce or increase their occurrence. Finally, prevention measures and what they should be outlined, and the main emphasis is on a school that should have universal measures to reduce the stigmatization of children at risk.