# What is the difference between ADHD and Down Syndrome in young children? Canonical: https://pinnacleblooms.org/ask/what-is-the-difference-between-adhd-and-down-syndrome-in-young-children Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited ADHD and Down syndrome are very different. Down syndrome is a genetic condition caused by an extra chromosome 21, present from birth and usually recognised early, affecting physical features, growth and learning. ADHD is a neurodevelopmental pattern of attention, activity and impulse control that emerges over the early-to-school years, with no birth test or physical sign. One is identified by genes, the other by behaviour observed over time — and the two can sometimes co-occur. *Two very different conditions, often confused — yet each child is wonderfully capable in their own way.* ## In short **ADHD** (attention-deficit/hyperactivity disorder) and **Down syndrome** are quite distinct. Down syndrome is a *genetic* condition, present from birth, caused by an extra copy of chromosome 21 — it is usually recognised at or soon after birth and affects physical features, growth and learning. ADHD is a *neurodevelopmental* pattern of attention, activity and impulse regulation that emerges and is recognised over the early-to-school years, with no single physical sign or birth test. One is identified by genes; the other by behaviour observed over time. ## How they differ in young children Down syndrome is confirmed through a chromosome test, often soon after birth, and is associated with characteristic facial features, lower muscle tone (hypotonia), and a developmental pace that is steadier and slower across milestones. Health checks for the heart, hearing and thyroid are part of routine care. ADHD, by contrast, is not visible on any scan or blood test. It is a *pattern* — sustained difficulty with attention, restlessness or impulsivity that is beyond what's usual for a child's age and shows up across home and preschool. It is rarely assessed meaningfully before the preschool years, because high activity and short attention are normal in toddlers. Importantly, the two can co-occur — a child with Down syndrome may also show ADHD-type attention patterns. ## When to seek a review If you have any concern about your child's development, growth, attention or learning, a developmental check brings clarity and the right support early. ## The Pinnacle way This is general information, not a diagnosis — a clinical [AbilityScore®](/ask/what-is-the-abilityscore-and-how-is-it-calculated) and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care, never from an app or form. Our team understands both [ADHD](/adhd) and genetic conditions, building individualised plans that may draw on [occupational therapy](https://www.pinnacleblooms.org/best-occupational-therapy-center-india-proven-improvement-rate) and other supports. ## Trusted sources WHO ICD-11 on neurodevelopmental conditions; CDC and the American Academy of Pediatrics (HealthyChildren) on ADHD and Down syndrome in children. **Next step —** If you'd like clarity on your child's development, book a developmental review to understand their strengths and any helpful support. ## Sources - WHO ICD-11: neurodevelopmental conditions: https://icd.who.int - CDC: ADHD in children: https://www.cdc.gov/adhd/about/index.html - AAP HealthyChildren: child development: https://www.healthychildren.org ## Connected topics and perspectives - Parent / Family: https://pinnacleblooms.org/ask/lens/stakeholder/parent - Cognitive: https://pinnacleblooms.org/ask/lens/domain/cognitive - Definition: https://pinnacleblooms.org/ask/lens/intent/definition - Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen - Screen: https://pinnacleblooms.org/ask/lens/route/screen - Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity - Adhd: https://pinnacleblooms.org/ask/lens/condition/adhd - English: https://pinnacleblooms.org/ask/lens/language/en - SDG 10: Reduced Inequalities: https://pinnacleblooms.org/ask/lens/sdg/10 - SDG 3: Good Health and Well-being: https://pinnacleblooms.org/ask/lens/sdg/3 - Doctor / Pediatrician: https://pinnacleblooms.org/ask/lens/stakeholder/doctor - Therapist / Clinician: https://pinnacleblooms.org/ask/lens/stakeholder/therapist ## Related question paths ### Understand the subject - ADHD vs Genetic / Chromosomal Syndromes in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-adhd-and-genetic-chromosomal-syndromes-in-young-children - Autism Spectrum vs Down Syndrome in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-autism-spectrum-and-down-syndrome-in-young-children - Conduct-Dissocial Disorder vs Down Syndrome in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-conduct-dissocial-disorder-and-down-syndrome-in-young-children - Attachment Difficulties vs Down Syndrome in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-attachment-difficulties-and-down-syndrome-in-young-children - Down Syndrome vs Emotional & Behavioural Difficulties: https://pinnacleblooms.org/ask/what-is-the-difference-between-down-syndrome-and-emotional-and-behavioural-difficulties-in-young-children - Down Syndrome vs Intellectual Disability in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-down-syndrome-and-intellectual-disability-in-young-children - ADHD vs Attachment Difficulties in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-adhd-and-attachment-difficulties-in-young-children - ADHD vs Auditory Processing Difficulties in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-adhd-and-auditory-processing-difficulties-in-young-children - What is the difference between ADHD and Autism Spectrum in young children?: https://pinnacleblooms.org/ask/what-is-the-difference-between-adhd-and-autism-spectrum-in-young-children - ADHD vs Cerebral Palsy in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-adhd-and-cerebral-palsy-in-young-children - What is the difference between ADHD and Childhood Anxiety in young children?: https://pinnacleblooms.org/ask/what-is-the-difference-between-adhd-and-childhood-anxiety-in-young-children - ADHD vs Childhood Apraxia of Speech in Young Children: https://pinnacleblooms.org/ask/what-is-the-difference-between-adhd-and-childhood-apraxia-of-speech-in-young-children