The major symptoms of ODD are defiance, extreme stubbornness, temper and anger problems, and being argumentative. Boys are diagnosed with ODD more often than girls before puberty. After puberty, this number becomes more even between girls and boys.
Although some experts believe that ODD may lead to Conduct Disorder, other experts disagree and believe these to be two separate mental illnesses.
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Eileen Bailey is a freelance health writer. She is the author of What Went Right: Reframe Your Thinking for a Happier Now, Idiot’s Guide to Adult ADHD, Idiot’s Guide to Cognitive Behavioral Therapy, Essential Guide to Overcoming Obsessive Love, and Essential Guide to Asperger’s Syndrome. She can be found on Twitter @eileenmbailey and on Facebook at eileenmbailey.