Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder commonly diagnosed in children, though it can persist into adulthood. It is characterized by symptoms such as inattention, hyperactivity, and impulsivity, which can affect daily functioning and academic performance. ADHD is believed to have a genetic component and may involve differences in brain structure and function. Treatment options often include behavioral therapy, educational support, and, in some cases, medication to help manage symptoms and improve focus and self-control.