Main health issues
Injuries
Unintentional injuries are the leading cause of death and disability among adolescents. In 2019, over 115 000 adolescents died as a result of road traffic accidents. Many of those who died were “vulnerable road users”, including pedestrians, cyclists or users of motorized two-wheelers. In many countries, road safety laws need to be made more comprehensive, and enforcement of such laws needs to be strengthened. Furthermore, young drivers need advice on driving safely, while laws that prohibit driving under the influence of alcohol and drugs need to be strictly enforced among all age groups. Blood alcohol levels should be set lower for young drivers than for adults. Graduated licences for novice drivers with zero-tolerance for drink-driving are recommended.
Drowning is also among the top causes of death among adolescents – more than 30 000 adolescents, over three quarters of them boys, are estimated to have drowned in 2019. Teaching children and adolescents to swim is an essential intervention to prevent these deaths.
Violence
Interpersonal violence is the fourth leading cause of death in adolescents and young people globally. Its prominence varies substantially by world region. It causes nearly a third of all adolescent male deaths in low- and middle-income countries in the WHO Region of the Americas. According to the global school-based student health survey 42% of adolescent boys and 37% of adolescent girls were exposed to bullying. Sexual violence also affects a significant proportion of youth: 1 in 8 young people report sexual abuse.
Violence during adolescence also increases the risks of injury, HIV and other sexually transmitted infections, mental health problems, poor school performance and dropout, early pregnancy, reproductive health problems, and communicable and noncommunicable diseases.
Effective prevention and response strategies include promoting parenting and early childhood development; addressing school-based bullying prevention, programmes that develop life and social skills, and community approaches to reduce access to alcohol and firearms. Effective and empathetic care for adolescent survivors of violence, including ongoing support, can help with the physical and psychological consequences.
Mental health
Depression is one of the leading causes of illness and disability among adolescents, and suicide is the third leading cause of death in people aged 15–19 years. Mental health conditions account for 16% of the global burden of disease and injury in people aged 10–19 years. Half of all mental health disorders in adulthood start by age 14, but most cases are undetected and untreated.
Many factors have an impact on the well-being and mental health of adolescents. Violence, poverty, stigma, exclusion, and living in humanitarian and fragile settings can increase the risk of developing mental health problems. The consequences of not addressing adolescent mental health conditions extend to adulthood, impairing both physical and mental health and limiting opportunities to lead fulfilling lives as adults.
Building socioemotional skills in children and adolescents and providing them with psychosocial support in schools and other community settings can help promote good mental health. Programmes to help strengthen the ties between adolescents and their families and improve quality of home environments are also important. If problems arise, they should be detected and timely managed by competent and caring health workers.
Adolescent mental health fact sheet
Alcohol and drug use
Drinking alcohol among adolescents is a major concern in many countries. It can reduce self-control and increase risky behaviours, such as unsafe sex or dangerous driving. It is an underlying cause of injuries (including those due to road traffic accidents), violence and premature deaths. It can also lead to health problems in later life and affects life expectancy. Worldwide, more than a quarter of all people aged 15-19 years are current drinkers, amounting to 155 million adolescents. Prevalence of heavy episodic drinking among adolescents aged 15–19 years was 13.6% in 2016, with males most at risk.
Cannabis is the most widely used psychoactive drug among young people with about 4.7% of people aged 15–16 years using it at least once in 2018. Alcohol and drug use in children and adolescents is associated with neurocognitive alterations which can lead to behavioural, emotional, social and academic problems in later life.