Being a "Teenager" is a transitional stage of physical and mental human development that occurs between childhood and adulthood. This transition involves biological (i.e. pubertal), social, and psychological changes, though the biological or physiological ones are the easiest to measure objectively. It is between the ages of 13 to 19 years. Historically, puberty has been heavily associated with teenagers and the onset of adolescent development. In recent years, however, the start of puberty has seen an increase in preadolescence (stage before adolescence) and extension beyond the teenage years, making adolescence less simple to discern.
In today's high-pressure world, seeing troubled teens is an all too familiar occurrence. Teens receive pressure from parents, school, peers, advertising and all the other amount of information that is thrown at them daily. It's no wonder that the term "troubled teens" is so well known.
