Attention deficit hyperactivity disorder, or ADHD, is a mental disorder characterized by excessive restlessness and impulsive actions. Individuals with ADHD may also struggle to maintain concentration or sit still for extended periods. Inattention and fluctuating energy levels are common problems associated with it. These conditions occur more frequently and to a more considerable extent for someone with ADHD than those without the disorder. It can significantly impact their schoolwork, career, and personal life. ADHD may affect anybody at any age.