Around half of U.S. teens meet the criteria for a mental disorder and nearly one in four report having a mood, behavior or anxiety disorder that interferes with daily life, American researchers say.

Suicide has emerged as the second-largest cause of youth deaths in 2009, when 6.3 out of every 100,000 young people died of suicide, up 2.4 percent from 2008, according to statistics compiled by the National Suicide Prevention Center (NSPC) under the Cabinet-level Department of Health.

Mental illnesses like schizophrenia or bipolar disorder alone do not make people more violent, but the tendency of people with psychiatric problems to abuse drugs or alcohol does, scientists said on Monday.

They say money can't buy happiness. They're wrong.

Having good social relationships — friends, marriage or children — may be every bit as important to a healthy lifespan as quitting smoking, losing weight or taking certain medications, U.S. researchers reported on Tuesday.

A device may be able to automatically screen young children for autism based on how they talk, U.S. researchers said on Monday.

The once-cherished afternoon siesta is a thing of the past for most residents of Argentina's bustling capital Buenos Aires. But things might be about to change.

People with depression shouldnot stop taking their prescription medication just because they feel their condition has improved, especially if they are still displaying symptoms such as insomnia or shoulder cramps, a doctor warned yesterday.

Just five minutes of exercise a day in the great outdoors can improve mental health, according to a study released on Saturday, and policymakers should encourage more people to spend time in parks and gardens.

A group of Taiwan scientists have successfully identified four genes that are associated with bipolar I disorder in people who are ethnically Chinese.