Children of all ages can experience insomnia too; it is not just partial to adults. Often when children experience insomnia it can be for some of the very same reasons that adults experience it, a change in schedule as maybe they are going back to school after summer vacation, too much sugar or caffeine, family or school related stress, or a lack of routine. A lack of routine is a result of parents not establishing a regular routine and defining a specific bedtime.
While insomnia is not a disease but a condition it can have a detrimental effect on children as they are tired and grumpy during the day, often hard for teachers to manage, and this can lead to behavior problems too. If this is something that happens every night then it could be the temperament of the child could be the primary reason. If children know that they can get away with it, they will fight sleep for hours to prove a point.
However, if your child has insomnia that is accompanied with nervousness, irritability, intensity, high strung, excitable, and easily angered then it might be that your child has Attention Deficit Hyperactive Disorder (ADHD). There is a direct relationship between ADHD and...