This dream could take place when you have gone to bed while still being hungry. However, dreams that refer to appetite may reflect a need for more love and affection, as well as the need to express emotions. In any case, dreaming that you have an appetite is evidence of a desire to live and an important stream of energy. Having a lot of appetite is a sign of growing apart from family and friends. Not having it presupposes the arrival of bad news.
In most kids, lack of sleep can surely result to ADHD (Attention Deficit Hyperactivity Disorder), which is the opposite with the adults. Children between 7 and 10 who gets less than 8-hours of sleep every night will likely to become inattentive, impulsive and hyperactive. Their sleeping patterns can easily affect their brain.
One of the reasons why people always get involved in road accidents is that, they are tired while driving, or that they lack sleep. Many people do not realize that their performance can be highly affected by having not enough sleep. Sleep deprivation can affect reaction as well as decision making, not to mention that it could make a person unable to drive well. It goes the same with drunk driving.