{"h1":"When to worry about Rett Syndrome in a 5-year-old","faq":[{"a":"Most often between 6 and 18 months, when a baby who was developing typically begins to slow down or lose skills — especially hand use and any words she had — often with repetitive hand movements. It rarely first appears as late as 5.","q":"At what age does Rett Syndrome usually appear?"},{"a":"A child who has reached 5 with steady, ongoing growth in speech, play and purposeful hand use does not fit the classic Rett pattern. The condition's hallmark is loss of skills already gained, usually in infancy or toddlerhood.","q":"My 5-year-old is developing well — could she still have Rett Syndrome?"},{"a":"Loss of skills your child once clearly had — fading words, loss of skilled hand use, or changes in walking. Any regression at any age deserves prompt review by a paediatrician or paediatric neurologist.","q":"What is the most important sign to watch for?"},{"a":"No. It is a genetic, medical condition that needs a paediatrician and neurologist, including genetic testing where indicated. Therapy supports communication, hand use and daily skills alongside that medical care.","q":"Is Rett Syndrome treated with therapy alone?"}],"lang":"en","slug":"when-should-i-worry-that-my-5-year-old-might-have-rett-syndrome","title":"When should I worry about Rett Syndrome at age 5?","entity":{"key":"rett","kind":"condition","name":"Rett Syndrome","slug":"rett-syndrome"},"lenses":[{"kind":"stakeholder","label":"Parent","value":"parent"},{"kind":"age","label":"Kinder-5y","value":"kinder-5y"},{"kind":"domain","label":"Context","value":"context"},{"kind":"intent","label":"Concern","value":"concern"},{"kind":"lifecycle","label":"Screen","value":"screen"},{"kind":"route","label":"Special-Education","value":"special-education"},{"kind":"empowerment","label":"Early Clarity","value":"early_clarity"}],"parent":{"key":"conditions","label":"Conditions"},"related":[{"lang":"en","slug":"what-are-the-early-signs-of-rett-syndrome-in-a-5-year-old","title":"Early Signs of Rett Syndrome in a 5-Year-Old"},{"lang":"en","slug":"when-should-i-worry-that-my-3-year-old-might-have-rett-syndrome","title":"When should I worry that my 3-year-old might have Rett Syndrome?"},{"lang":"en","slug":"when-should-i-worry-that-my-4-year-old-might-have-rett-syndrome","title":"When should I worry that my 4-year-old might have Rett Syndrome?"},{"lang":"en","slug":"when-should-i-worry-that-my-2-year-old-might-have-rett-syndrome","title":"When should I worry that my 2-year-old might have Rett Syndrome?"},{"lang":"en","slug":"when-should-i-worry-that-my-18-to-24-month-old-might-have-rett-syndrome","title":"When should I worry about Rett Syndrome at 18–24 months?"},{"lang":"en","slug":"when-should-i-worry-that-my-6-year-old-might-have-rett-syndrome","title":"When should I worry about Rett Syndrome in my 6-year-old?"}],"summary":"Rett Syndrome usually shows itself between 6 and 18 months, not at 5 — most often as a child slows or loses hand and speech skills she once had, with repetitive hand-wringing movements. A 5-year-old with steady, ongoing development does not fit this pattern. The key sign at any age is loss of previously gained skills, which always deserves prompt medical and neurological review — not a diagnosis, a reason to assess early.","answer_md":"*If you're reading carefully about your bright, busy 5-year-old, that watchfulness is a form of love — let's bring some clarity to what Rett Syndrome actually looks like.*\n\n## In short\nRett Syndrome usually announces itself far earlier than age 5 — most often between **6 and 18 months**, when a baby who was developing typically begins to slow down or lose skills she once had, especially hand use and spoken words, often alongside repetitive hand movements (wringing, washing or mouthing). If your daughter reached age 5 with steady, ongoing development of speech, play and purposeful hand use, the classic profile of Rett is unlikely. The single most important thing to watch at any age is **loss of skills a child once clearly had** — and that always deserves prompt medical review, not worry alone.\n\n## What Rett Syndrome actually looks like\nRett Syndrome (ICD-11 LD90.0) is a genetic neurodevelopmental condition, most often linked to changes in the *MECP2* gene, and seen almost entirely in girls. Its hallmark is a recognisable pattern over time rather than a single sign:\n\n- **A period of typical early development**, usually for the first 6–18 months.\n- **A slowing or regression** — losing purposeful hand skills and any words or babble that had appeared.\n- **Stereotyped hand movements** — repetitive wringing, clapping, washing or hand-to-mouth motions.\n- **Slowing of head growth** in early childhood.\n- **Gait and coordination differences** — unsteady, stiff or wide-based walking.\n\nBecause this pattern typically emerges in infancy and toddlerhood, a child whose speech, hand use and play have grown steadily to age 5 does not fit the Rett picture. If, however, your 5-year-old has shown a **loss of language, hand skills or walking** she previously had, or has unexplained repetitive hand movements, this is a reason to see a paediatrician or paediatric neurologist promptly — Rett and several other conditions are best evaluated by a doctor, including genetic testing where indicated.\n\n## When to act\nSeek a medical review now if you notice any *regression* — words, gestures or skilled hand use that have faded — repetitive hand-wringing or washing movements, a clear change in walking, or if your own instinct says something has shifted. These are reasons to assess, never a diagnosis, and earlier review means earlier support.\n\n## The Pinnacle way\nA 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 online list. Because Rett Syndrome is a medical and genetic condition, our clinicians work alongside your paediatrician and neurologist: we build a developmental baseline, support communication and motor skills, and coordinate care around your child's strengths. You can read more about [Rett Syndrome](/rett-syndrome) and how our [occupational therapy](https://www.pinnacleblooms.org/best-occupational-therapy-center-india-proven-improvement-rate) team supports hand use, play and daily skills.\n\n## Trusted sources\nWHO ICD-11 classification of Rett Syndrome; American Academy of Pediatrics (healthychildren.org) guidance on developmental regression and when to seek paediatric review; CDC \"Learn the Signs, Act Early\" milestone resources.\n\n**Next step —** Trust what you've noticed. If you've seen any loss of skills, see your paediatrician promptly, and [book a developmental assessment](https://www.pinnacleblooms.org/enroll-autism-speech-aba-therapies-india) with a Pinnacle clinician for clarity and coordinated support.\n\nThis is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.","canonical":"https://pinnacleblooms.org/ask/when-should-i-worry-that-my-5-year-old-might-have-rett-syndrome","editorial":{"reviewed_at":"2026-06-11T20:12:18.613642+00:00","reviewed_by":null,"developed_by":"SETU Consortium · Pinnacle Blooms Network"},"alternates":[{"href":"https://pinnacleblooms.org/ask/when-should-i-worry-that-my-5-year-old-might-have-rett-syndrome","lang":"en","indexable":true}],"dimensions":[{"key":"conditions","label":"Conditions"}],"meta_title":"Rett Syndrome Worries in a 5-Year-Old","meta_robots":"index, follow, max-image-preview:large","everyday_tip":"Keep a simple monthly note of your child's new and steady skills — words, drawing, dressing, hand use. A short record makes any change easy to spot and gives a doctor clear, useful information.","published_at":"2026-06-10T11:00:00.139124+00:00","reading_paths":[{"key":"understand","items":[{"lang":"en","slug":"how-does-rett-syndrome-affect-a-child-s-daily-life","title":"How Rett Syndrome Affects a Child's Daily Life","reason":"Same topic"},{"lang":"en","slug":"is-rett-syndrome-considered-a-disability","title":"Is Rett Syndrome considered a disability?","reason":"Same topic"},{"lang":"en","slug":"is-rett-syndrome-genetic-or-hereditary","title":"Is Rett Syndrome Genetic or Hereditary?","reason":"Same topic"},{"lang":"en","slug":"what-are-common-myths-about-rett-syndrome","title":"What are common myths about Rett Syndrome?","reason":"Same topic"},{"lang":"en","slug":"what-are-the-types-or-levels-of-rett-syndrome","title":"Types and Stages of Rett Syndrome","reason":"Same topic"},{"lang":"en","slug":"what-causes-rett-syndrome-in-children","title":"What causes Rett syndrome in 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To Do Next","reason":"Same topic"}],"label":"Explore therapy & support","total":68},{"key":"home","items":[{"lang":"en","slug":"how-can-i-support-my-child-with-rett-syndrome-at-home","title":"How can I support my child with Rett Syndrome at home?","reason":"Same topic"}],"label":"At home & in everyday life","total":1}],"what_to_watch":"Watch above all for loss of skills your child once had — fading words, loss of purposeful hand use, or a change in walking. Repetitive hand-wringing, washing or mouthing movements, and any clear regression, deserve prompt review by a paediatrician or paediatric neurologist. A 5-year-old with steady, growing speech, play and hand skills does not fit the Rett pattern.","authority_links":[{"url":"https://icd.who.int/browse/2024-01/mms/en","code":"LD90.0","label":"WHO ICD-11: Rett Syndrome (LD90.0)"},{"url":"https://www.healthychildren.org","label":"AAP HealthyChildren: developmental concerns and when to seek review"},{"url":"https://www.cdc.gov/child-development","label":"CDC: Learn the Signs, Act Early"}],"last_reviewed_at":"2026-06-10T11:00:00.139124+00:00","meta_description":"Rett Syndrome usually appears at 6–18 months, not age 5. Learn the real signs, why skill loss matters most, and when to seek prompt medical review.","related_materials":[],"related_techniques":[]}