Things to ponder. Opposition Defiant Disorder - "Teens test boundaries, make mistakes and sometimes have little respect for their parents. Teens with ODD experience these normal teenage behaviors but may have a harder time living with them.
Mental Illness- "Research has demonstrated that an imbalance in brain chemicals can contribute to the development of some mental disorders. It’s suspected that this chemical imbalance impedes the ability of the brain to send messages in between neurons.