ADHD stands for Attention-Deficit/Hyperactivity Disorder. It is a neurodevelopmental disorder that affects both children and adults. In children, ADHD is characterized by symptoms of inattention, hyperactivity, and impulsivity that are more pronounced and persistent compared to typical developmental levels. These symptoms can impact a child's academic performance, social interactions, and daily functioning.

In adults, ADHD continues to manifest with symptoms of inattention, impulsivity, and hyperactivity. However, the presentation of these symptoms may differ from childhood and can lead to challenges in various aspects of life, including work, relationships, and personal organization.