There are some behavioral problems in children that would need to be diagnosed soon so that proper treatments can be done in order to improve their present condition. When you say Oppositional Defiant Disorder, this means that the person who is experiencing this will have the tendency to always be defiant towards any figure of authority. The person may sometimes lose his temper and will also be annoyed very easily by other people.
This can cause some issues because the person will always try to argue with other people to the point that it will already be unhealthy. Conduct Disorder, on the other hand, is a type of condition wherein the person will usually violate the various rules that have been given. The person may also fight with other people constantly and will normally be more aggressive when they want to break serious rules.