Generally, they're pretty healthy. Moreover, adolescents experience major distress in about the same proportion as adults do, that is, one in five. Adolescents are lazy and irresponsible. They often seek tasks that challenge them and can make a difference. We need to create and expand opportunities that tap into their energy and idealism.
Adolescence starts with the teenage years.
Adult expectations and behavior toward young people affects kids as much as, if not more than, biology. What appears to be vanity is often an attempt to understand one's rapid development. In adolescence, for the first time, young people are intellectually able to contrast themselves with others, which can result in a deep sense of insecurity and loneliness. Brains shut down during adolescence. They are incapable of learning anything serious.