Hi, I'd like to help your with problem.
A small percentage of children, approximately 2 to 3 percent of the population, are described as challenging children. These children are difficult to redirect, seem extremely stubborn, and are challenging enough to make parents wonder what they are doing wrong.
The good news is that these children often grow into dynamic and leadership oriented adults. However, between the ages of 2 and 10 the traits that will make them leaders and problem solvers are limited by the maturity of their brains. In these children, the frontal lobe (prefrontal cortex) is not mature. This part of the brain controls impulsivity and in these children it is not mature enough to handle their raw emotions and desires.
These children require special types of parenting. The first resources you should try are written specifically for these children. They include strong and very consistent behavioral techniques that when followed help control and mature behaviors.
Some resources that are excellent are The New Strong-Willed Child by James C. Dobson which is inexpensive on Amazon.com or your local library may be able to get it for you. Also, Raising Your Spirited Child Rev Ed: A Guide for Parents Whose Child Is More Intense, Sensitive, Perceptive, Persistent, and Energetic by Mary Sheedy Kurcinka is good. And finally, The Challenging Child: Understanding, Raising, and Enjoying the Five "Difficult" Types of Children by Stanley I. Greenspan and Jacqueline Salmon.
These resources should prove to be extremely helpful. If they do not (though I feel they will) a child behavioral specialist should be helpful in treating this issue and giving the child's parents the professional support and guidance to resolve the issue. Often, the child's pediatrician is helpful in providing a referral.
I hope this has helped you,