Living in a city could significantly increase young people's vulnerability to psychotic experiences, according to a new study.

One in three high school students reports riding with a driver who has been drinking, while nearly one in five was in a car where the driver had consumed marijuana, according to a new study.

A new study into the effects of chronic physical illness in children on their life-long mental health has found that such experiences appear to increase the chances of them having depression and anxiety in adulthood.

When high school students started smoking marijuana regularly they were less likely to get good grades and want to pursue university, according to a new study.

Adolescents who were physically abused or sexually abused were more likely to engage in non-suicidal self-injury than their non-abused counterparts, according to a new study.

New research found adolescents who reported greatest access to guns -- either in their own home or a friend's - also were among those with higher risk for violent behavior. Researchers discovered additional factors linked with increased firearms access that included past suicide attempts and self-reported mental health disorder diagnoses.

While it's estimated at least one in 10 teens in the US suffer from depression at some point, few will use the word 'depressed' to describe negative emotions hanging over them. Instead, new research suggests, they're likely to use terms such as 'stressed,' or 'down,' and other words that may sound like ordinary teen angst but could be a signal of more serious, pre-depressive symptoms.

Visits by teens to a Colorado children's hospital emergency department and its satellite urgent care centers increased rapidly after legalization of marijuana for commercialized medical and recreational use, according to new research.

More use of technology led to increases in attention, behavior and self-regulation problems over time for adolescents already at risk for mental health issues, a new study finds. However, on days that adolescents spent more time using digital technologies they were less likely to report symptoms of depression and anxiety.

School bullies and their victims are more likely to want plastic surgery than other teens, according to new research. 11.5% of bullying victims have extreme desire to have cosmetic surgery, as well as 3.4% of bullies and 8.8% of teenagers who both bully and are bullied, compared with less than 1% of those who are unaffected by bullying, the study concludes.

Contrary to popular perception, a new study finds that youth violence is declining -- and at noteworthy rates. Between 2002 and 2014, researchers found a 29 percent decrease in the relative proportion of young people involved in violence in the United States. The study also reveals a persistent pattern of racial and ethnic disparities in youth violence.

Children with obesity face four times the risk of developing type 2 diabetes compared to children with a body mass index (BMI) in the normal range, according to a new study.

The largest genomic analysis of puberty timing in men and women conducted to date has identified 389 genetic signals associated with puberty timing, four times the number that were previously known.

Family structure including regular bedtimes, mealtimes and limited screen time appear to be linked to better emotional health in preschoolers, and that might lower the chances of obesity later, a new study suggests.

A researcher is suggesting the types of cooking oils people consume may be sabotaging their efforts to stay healthy and avoid illnesses such as diabetes.

Decades of research explain why adolescent biology makes the 7:30 a.m. school bell so problematic.

One in three adolescents with autism spectrum disorder acquires an intermediate driver's license, and the majority does so in their 17th year. The vast majority of teens with ASD who receive a learner's permit goes on to receive their license within two years after becoming eligible, suggesting that families make the decision of whether their children with ASD will learn to drive before their teens ever get behind the wheel.

Adolescents' use of Instagram actually strengthened the closeness of their friendships, new research has found. However, investigators warn that frequent use can also lead to an increase in depressed moods.

Mothers who gain weight in the years leading up to pregnancy have an increased risk of gestational diabetes. Women gaining more than 2.5 percent of their body weight each year tripled their risk of gestational diabetes compared to women who maintained a stable weight. This risk doubled for women with a small weight gain (1.5 to 2.5 percent). Even women with small weight gains within the healthy BMI range doubled their risk of gestational diabetes.

When mothers and daughters have to choose potential partners, they do not look much further than skin deep. Mothers will choose a man who is only reasonably attractive for their daughters. Daughters on the other hand prefer an attractive man, no matter how respectful, friendly, or intelligent he may be.