What are the main signs and symptoms of ADHD?

People with ADHD can show signs of inattention, hyperactivity, impulsivity, or both.^[1] This can manifest as difficulty paying attention to details, getting sidetracked from schoolwork, troubles with organization, and being easily distracted. Other behaviors include fidgeting or squirming, inability to remain seated when expected, inappropriate running or climbing, and talking excessively. ADHD in adults is often internalized and may present as restlessness, scattered thoughts, and poor time management.^[2]