Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder that affects both children and adults. It is characterized by symptoms of inattention, hyperactivity, and impulsivity that can interfere with daily functioning and social interactions. People with ADHD may have difficulty focusing, staying organized, and controlling their impulses. The exact cause of ADHD is not known, but it is believed to be a combination of genetic, environmental, and neurological factors. Treatment for ADHD typically includes a combination of medication, therapy, and behavioral interventions.