Read this web site from the Mayo Clinic. In the first paragraph they state the following:
If your child has signs and symptoms common to oppositional defiant disorder, make an appointment with your child's doctor. After an initial evaluation, your doctor may refer you to a mental health professional, who can help make a diagnosis and create the right treatment plan for your child.
If you are a parent of a child with ODD behavior you may want to learn effective parenting techniques that will change his behavior.
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