ADD / ADHD Signs and Symptoms

A person is considered to have ADHD if he or she demonstrates symptoms of inattention, hyperactivity, and impulsivity for at least 6 months in at least two settings (such as at home and in school). The signs and symptoms listed below are typically seen in children with ADHD and usually appear before age seven. (In order to diagnose ADHD in adults, psychiatrists must determine how the adult patient behaved as a child.)