[The epidemiology of chronic pain in children and adolescents].

The review highlights the main aspects of the epidemiology of chronic pain (pain lasting more than three months) as a factor that has a significant impact on the quality of life of children and adolescents. The paper presents new data on the epidemiology of headache, abdominal pain, musculoskeletal pain and combined pain syndromes. The author draws attention to the importance of alexithymia as a factor aggravating chronic pain in children and adolescents.