Around one in seven children and adolescents aged 10 to 19 are affected by mental health conditions – with anxiety, depression and behavioural disorders among the most common, according to a new World Health Organization and UN Children’s Fund report released on Wednesday.

In addition, one-third of mental health conditions emerge before the age of 14 and half before the age of 18.

Published ahead of World Mental Health Day, celebrated annually on 10 October, the report seeks to support the transformation of mental health services for children and adolescents.

It underscores the importance of early action as an essential ingredient to enable children and young people realise their full potential.

Despite the need for action, access to services remains largely inaccessible.

Most young people experiencing concerning mental health symptoms cannot access care due to systemic barriers such as low service availability, unaffordable costs and stigma preventing them from seeking help.

Further, while public funding and human resources for services is low worldwide in general, those aimed at children and adolescents are particularly unavailable, especially in low and middle-income countries.

“We must take action to ensure that evidence-based and age-appropriate interventions are available and affordable for all,” said Dévora Kestel, Director of Mental Health, Brain Health and Substance Use at the World Health Organization (WHO).

“Every country, regardless of its circumstances, can do something to significantly improve the mental health of its children, young people and their families,” she added.

The report stipulates that supporting the mental health of children and teens must be a collective effort. While there is no single best model, it provides examples from around the world that show what can be achieved in different settings.