Symptoms and Signs
Attention-Deficit/Hyperactivity Disorder Symptoms and Signs
This page pulls together the symptom-level picture of Attention-Deficit/Hyperactivity Disorder in a way that is easier to skim than the full pillar page.
Main diagnosis page
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Clinical overview
- ADHD is not just distractibility. It is a longstanding pattern of inattention, hyperactivity, impulsivity, or some combination of the three that starts early, shows up across settings, and genuinely gets in the way of functioning.
- Two-domain structure: It helps to think in two buckets: inattentive symptoms and hyperactive-impulsive symptoms. Some patients live mostly in one domain, while others clearly show both.
- Cross-setting rule: The pattern should not live in just one environment. Symptoms need to show up in at least two settings, such as home, school, work, or social life.
- Adult nuance: Adults often look less overtly hyperactive than children. What shows up instead may be restlessness, disorganization, forgetfulness, and chronic executive-function problems.
Related Guides
- ADHD Symptoms in Adults
- ADHD vs Anxiety
- Attention-Deficit/Hyperactivity Disorder DSM Criteria Guide
- Attention-Deficit/Hyperactivity Disorder Scales and Assessment Tools
- Attention-Deficit/Hyperactivity Disorder Treatments and Medications
- When to Seek Professional Help for Attention-Deficit/Hyperactivity Disorder