Adolescence has long been recognized as a period of heightened risk-taking and, accordingly, a stage that requires special oversight from adults. Nevertheless, expectations regarding this period and views of how adolescents should be treated have varied. A common subject of social commentary is that young people today begin adolescence too early and leave it too late .The decline in the age of onset of menarche for girls. This report a brief synopsis of the knowledge and interests with adolescent health; an overview of different from childhood & adulthood, Including health behavior of adolescents and an outline of the protective and risk of adolescent. Once you have decided to read, you will benefit from the information in this report about the adolescent health, and behavioral aspects of growth. During adolescence, you’ll notice changes in the way your child interacts with family, friends and peers. Every child’s social and emotional development is different. Your child’s development is shaped by your child’s unique combination of genes, brain development, environment, experiences.