Current problems of teenagers in the society are violence and more complex. Due to the rapid changes in many things, and together with the adolescent growth changes in body, mind and emotion. Resulted in problems with curious to try, such as smoking. firstly,smoking causes bad health and diseases. Such as lung disease and respiratory symptoms It causes a chronic cough. Breathing is not easy And can cause death.Secondly,smoking also affects every system in the body from head to toe. People who smoke will lose personality. The early balding gray hair, wrinkled face look older faster skunk odor, bad breath, tooth decay is a black stain teeth, gums and teeth, gum cigarette finger nails yellow, yellow, bloated, loss of appetite, bloating, fullness.