Smoking, Drinking, and Drugs. The same impaired judgment that can cause car accidents can also result in making bad choices. Teens use caffeine, nicotine, and other stimulants to stay awake, and the more they use, the later they stay up, and the more tired they are when they have to wake up for school in the morning. Soft drinks such as Mountain Dew and Surge, have even more caffeine than coffee or cola. Conflicts with Family and Friends Everyone knows that tired babies are cranky.
Research shows that tired adolescents and adults are also cranky.
This can contribute to constant tension between family members. They have trouble paying attention in class and may be short-tempered with teachers and other students. After school, they may have a job, athletics, or spend time with their friends.