In an oneiric situation this image is always a sign of conflict. Its interpretation depends on the place the dreamer is placed within the scene: whether she is an observer, a participant, whether she wins or loses, or walks alone over the battlefield. The stage where the fight takes place is associated with the environment of the dreamer in real life. Moreover, you must address the feelings of triumph or defeat to understand the message of the unconscious.
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.
Sleeping can help with the overall well-being than avoiding irritability. A lack of sleep can easily contribute to depression, but having a good one could easily change your mood or alleviate your anxiety. With a good night's sleep, you'll surely have emotional stability and balance.