Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder marked by three key symptom patterns : attentional problems, hyperactivity and impulsivity. All of which can interfere with the functional ability of the individual.
ADHD is more common in males than females, and females with ADHD are more likely to have problems primarily with inattention. Other conditions, such as learning disabilities, anxiety disorder, conduct disorder, depression and substance abuse are common in people with ADHD.