Young adult unable to sleep. If you smoke, you should stop. With GERD, stomach acids move backward up into the esophagus, producing the uncomfortable, burning sensation known as heartburn. Narcolepsy is not commonly diagnosed in teens, but many cases go unrecognized. Everyone has trouble sleeping once in a while. You are a shift worker meaning that you work irregular hours. Home Insomnia What Causes Insomnia? So during an average night's sleep, a person will experience about four or five cycles of sleep. However, some children and teens simply have trouble getting to sleep or resist a regular bedtime because their internal clocks are more delayed. Kliger B, et al. Please use one of the following formats to cite this article in your essay, paper or report: Excessive tiredness can be caused by all sorts of health problems, not just problems with sleep.