IntroductionTeenagers go through many physical and biological changes, their entire body and brain changes from childhood to adolescence, a period in which they tend to face everything new in their life and to try whatever their couples do, even if it was bad for them, teenagers don't care what the circumstances of their risky actions are. They tend to be very risky and do whatever comes to mind without thinking, because their brain at that moment is structured to perform any risky and immature action. Adolescent brains are not fully developed until age 25, their brains develop unequally, and their judging part of the brain called the prefrontal cortex which controls reasoning and impulses, and the physical coordination cerebellum does not they are fully developed until they reach age 25. This is why they tend to take risks and do not think about their actions. On the other hand, researchers have so far researched why they tend to perform risky actions and how their brain develops during childhood and adolescence, and what are the secrets that run through their brain during that period. Main points Why do teenagers take risks? Adolescence is the intermediate period between childhood and adulthood, often ranging from ages 11 to 18. However, up until the age of 25, adolescence tends to be like most people who take risks, and this is because their brain is not fully mature and developed yet, and in that period the percentage of impulsive actions and risky increases its highest point and can even lead to fatal outcomes such as physical abuse, drug and alcohol addiction, suicide, anxiety, sadness, depression, anger, sexual diseases. (Adriana Galvan, 2007) There is evidence that have... middle of paper ......among adolescents, the danger of sexually transmitted diseases is more common among them because they are not prohibited as in Eastern societies. And in Western societies we have noticed that drug addiction, excessive alcohol consumption and sexual intercourse are more common among adolescents while, on the other hand, the similarity between these two societies lies in smoking and recklessness, intolerance and in the changes in mental and physical development that occur in an adolescent. Additionally, researchers have developed strategies to prevent adolescent exposure to risk, for example, increasing the price of cigarettes, raising the driving age, preventing minors from purchasing alcohol, and raising awareness in schools about the dangers of their age and what they are what happens to their brain and how to control your behavior and think before doing anything or ask an adult before making any serious decision