Paediatric behavioural, developmental, and mental health issues are more common than childhood cancers, cardiac problems, and renal problems combined.

Behavioural problems have often been conceptualized along two broad spectrums: internalizing problems which are expressed in intrapersonal manifestation, such as anxiety, depression, and withdrawal; and externalizing problems which are demonstrated in interpersonal manifestation, such as hyperactivity and aggression The lack of attention to the mental health of children and adolescents may lead to mental disorders with lifelong consequences, undermines compliance with health regimens, and reduces the capacity of societies to be safe and productive. As, children and adolescent mental health problems often have serious long term debilitating effects . Early identification and treatment of these problems are in the best interest of children, adolescents, their families, and society as a whole . All three essential ways in which epidemiology can contribute to our understanding of children and adolescent mental health: community burden, measurement, and triage were of utmost importance. planning and conducting the survey.

In this study the researchers will present the first large-scale survey of child and adolescent psychiatric disorders at Assiut government For adequate planning of services, including evidence-based mental health prevention and intervention, a population-representative survey of children and adolescent estimating mental disorders was urgently needed

Inclusion Criteria:

1. age of children (6-18 years)
2. both males and females.
3. have education in school at Assiut government.

Exclusion Criteria:

1- unwilling parent to recruited in the study.

This is study will take part in the first screening phase in the Assiut government school community study. The other part will be in the child and adolescent psychiatry clinic at Neurology and Psychiatry department at Assiut university hospital.