The nature of ODD is that your child does not see his or her behaviour as a problem. Instead he/she will probably believe that unreasonable demands are being forced on him/her. But if your child has signs and symptoms common to ODD then consult doctor. There are no clear signs or causes for this problem. It may be a combination of inherited and environment factors as under
(a) Genetics: A child's natural disposition or temperament and possibly nemological differences in the way the nerves and the brain functions.
(b) Environmental: Problems with parenting that may involve a lack of supervision, inconsistent or harsh discipline or abuse or neglect may contribute to the development of behavioural disorders.
(c) Biological: Some studies suggest that defect in or injuries to certain areas of the brain can lead to serious behavioural problems in children. In addition, ODD has been linked to abnormal functioning of certain types of brain chemicals or neurotransmitters.