Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder characterized by patterns of inattention, hyperactivity, and impulsivity that are more frequent and severe than typically observed in individuals at a comparable level of development. ADHD symptoms often appear in early childhood, though diagnosis can sometimes occur later when symptoms manifest in different settings like school or work. The core symptoms include difficulty maintaining attention, excessive activity, and acting without thinking about the consequences. The exact cause of ADHD is not known, but research suggests that genetics plays a significant role, along with potential environmental factors and differences in brain structure and function. Management of ADHD typically involves a combination of behavioral therapies, lifestyle adjustments, and medications to help improve concentration and decrease impulsive behavior. Proper treatment allows individuals with ADHD to manage their symptoms effectively and lead productive lives.