{"h1":"Selective Mutism at 18–24 months: when to worry","faq":[{"a":"It is too early to diagnose at this age. Selective mutism describes a verbal child who consistently doesn't speak in certain settings while speaking freely elsewhere — a pattern usually recognised once a child is regularly in those settings, often closer to or after age 3. At 18 months, focus on whether communication is developing overall.","q":"Can an 18-month-old have selective mutism?"},{"a":"Being quiet or clingy with strangers and warming up over time is typical toddler temperament, not selective mutism. Selective mutism is a persistent, consistent silence in specific settings in a child who clearly can speak. At 18–24 months, shyness is common and reassuring rather than worrying.","q":"Is my toddler being shy or is it selective mutism?"},{"a":"Seek a general developmental check if your toddler has very few or no words by 18–24 months, doesn't respond to their name, isn't pointing or gesturing, or has lost words they once used. These point to possible communication delay — not selective mutism — and benefit from early review.","q":"When should I actually seek a developmental check at this age?"}],"lang":"en","slug":"when-should-i-worry-that-my-18-to-24-month-old-might-have-selective-mutism","title":"When should I worry that my 18-to-24-month-old might have Selective Mutism?","entity":{"key":"selective-mutism","kind":"condition","name":"Selective Mutism","slug":"selective-mutism"},"lenses":[{"kind":"stakeholder","label":"Parent","value":"parent"},{"kind":"age","label":"Toddler-18-24","value":"toddler-18-24"},{"kind":"domain","label":"Emotional","value":"emotional"},{"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":"when-should-i-worry-that-my-2-year-old-might-have-selective-mutism","title":"When should I worry that my 2-year-old might have Selective Mutism?"},{"lang":"en","slug":"when-should-i-worry-that-my-6-to-9-month-old-might-have-selective-mutism","title":"When should I worry about Selective Mutism at 6–9 months?"},{"lang":"en","slug":"what-are-the-early-signs-of-selective-mutism-in-a-18-to-24-month-old","title":"Early signs of Selective Mutism in an 18–24-month-old"},{"lang":"en","slug":"when-should-i-worry-that-my-9-to-12-month-old-might-have-selective-mutism","title":"When to Worry About Selective Mutism at 9–12 Months"},{"lang":"en","slug":"when-should-i-worry-that-my-12-to-18-month-old-might-have-selective-mutism","title":"When to Worry About Selective Mutism at 12–18 Months"},{"lang":"en","slug":"what-are-the-early-signs-of-selective-mutism-in-a-12-to-18-month-old","title":"Early Signs of Selective Mutism in a 12-to-18-Month-Old"}],"summary":"At 18–24 months it is too early to diagnose selective mutism, which is normally recognised only once a verbal child consistently and persistently goes silent in specific settings, usually after age 3. At this age, focus on whether communication is growing — babbling, gestures, words and understanding. Shyness with strangers is common and not selective mutism. A general developmental check is warranted if words or understanding seem delayed.","answer_md":"*If your toddler chatters happily at home but falls silent elsewhere — and you're wondering whether to worry yet — your attentiveness is exactly the right instinct.*\n\n## In short\nAt 18 to 24 months, it is far too early to label [Selective Mutism](/selective-mutism) — and you do not need to worry about that diagnosis yet. Selective mutism is a pattern where a child who *can* speak consistently doesn't speak in specific social settings (often nursery or with unfamiliar people) while speaking freely where they feel safe — and it's normally only recognised once a child is regularly in those settings, usually closer to or after age 3. What matters at this age is simply that your toddler is *developing* communication: babbling, gestures, first words and understanding. Shyness and slow-to-warm temperament are very common and are not the same as selective mutism.\n\n## What is appropriate to watch at 18–24 months\nAt this stage, focus on whether communication is *growing*, not on where your child chooses to talk. Encouraging signs to look for:\n\n- **Understanding** — follows simple instructions, points to things when named, responds to their name.\n- **Words** — a handful of words by 18 months, growing toward many more and beginning to combine words by around 24 months.\n- **Communicating any way they can** — pointing, gesturing, showing, making sounds, leading you by the hand.\n- **Warming up** — being quiet or clingy with strangers, then relaxing into themselves at home, is typical toddler behaviour.\n\nWhat would warrant a general developmental check now is *not* selective mutism, but signs that communication itself may be delayed: very few or no words by 18–24 months, not responding to their name, no pointing or gesturing, or losing words they once used. Selective mutism becomes a meaningful question later — when a verbal child consistently and persistently goes silent in particular settings for a month or more (beyond the first settling-in weeks of nursery).\n\n## The Pinnacle way\nDevelopmental measurement supports care planning; diagnosis requires an appropriately qualified healthcare professional., under qualified clinician care — never from an online description or a single worry. If your concern is that words are slow to come, our [speech therapy](https://www.pinnacleblooms.org/top-speech-therapy-center-india-proven-improvement-rate) team can gently support early communication, and a structured, clinician-administered [AbilityScore®](/ask/what-is-the-abilityscore-and-how-is-it-calculated) builds your child's own developmental baseline so support fits *them*. For most warm, quiet toddlers, the answer is simply reassurance and a clear picture of how they're growing.\n\n## Trusted sources\nWHO ICD-11 framework (selective mutism, 6B06); American Academy of Pediatrics developmental surveillance guidance; CDC developmental milestones and 'Learn the Signs, Act Early' resources.\n\n**Next step —** If your toddler's words seem slow to arrive, [book a developmental check](https://www.pinnacleblooms.org/enroll-autism-speech-aba-therapies-india) with a Pinnacle clinician — and rest assured that quietness with strangers, at this age, is usually just a child taking their time.\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-18-to-24-month-old-might-have-selective-mutism","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-18-to-24-month-old-might-have-selective-mutism","lang":"en","indexable":true},{"href":"https://pinnacleblooms.org/ask/when-should-i-worry-that-my-18-to-24-month-old-might-have-selective-mutism-te","lang":"te","indexable":true}],"dimensions":[{"key":"conditions","label":"Conditions"}],"meta_title":"Selective Mutism at 18–24 Months: When to Worry","meta_robots":"index, follow, max-image-preview:large","everyday_tip":"Narrate your day in short, simple words and pause to give your toddler time to respond — with a sound, gesture or word. Notice and celebrate every way they communicate, not just talking, and keep a quick note of new words this month.","published_at":"2026-06-10T10:54:00.24648+00:00","reading_paths":[{"key":"understand","items":[{"lang":"en","slug":"how-does-selective-mutism-affect-a-child-s-daily-life","title":"How Selective Mutism Affects a Child's Daily Life","reason":"Same topic"},{"lang":"en","slug":"is-selective-mutism-considered-a-disability","title":"Is Selective Mutism considered a disability?","reason":"Same topic"},{"lang":"en","slug":"is-selective-mutism-genetic-or-hereditary","title":"Is Selective Mutism Genetic or Hereditary?","reason":"Same topic"},{"lang":"en","slug":"what-are-common-myths-about-selective-mutism","title":"What are common myths about Selective Mutism?","reason":"Same topic"},{"lang":"en","slug":"what-are-the-types-or-levels-of-selective-mutism","title":"What are the types or levels of Selective Mutism?","reason":"Same 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Advancing UNCRPD and the SDGs","reason":"Same topic"},{"lang":"en","slug":"what-are-the-known-contributing-factors-for-selective-mutism-in-early-childhood","title":"Contributing Factors for Selective Mutism","reason":"Same topic"},{"lang":"en","slug":"what-is-the-cost-effectiveness-of-early-therapy-for-selective-mutism-in-young-children","title":"Cost-effectiveness of early therapy for Selective Mutism","reason":"Same topic"},{"lang":"en","slug":"what-is-the-prevalence-and-public-health-burden-of-selective-mutism-among-young-children-in-india","title":"What is the prevalence and public-health burden of Selective Mutism among young children in India?","reason":"Same topic"}],"label":"Explore causes & influences","total":7},{"key":"assess","items":[{"lang":"en","slug":"how-does-abilityscore-track-progress-in-a-child-with-selective-mutism","title":"How AbilityScore Tracks Progress in Selective Mutism","reason":"Same 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Mutism?","reason":"Same topic"},{"lang":"en","slug":"how-is-selective-mutism-diagnosed-in-a-child","title":"How Is Selective Mutism Diagnosed in a Child?","reason":"Same topic"},{"lang":"en","slug":"how-is-selective-mutism-supported-through-therapy","title":"How Therapy Supports a Child with Selective Mutism","reason":"Same topic"},{"lang":"en","slug":"my-child-with-selective-mutism-has-an-abilityscore-of-0-100-what-should-we-do-next","title":"Selective Mutism AbilityScore — what to do next","reason":"Same topic"},{"lang":"en","slug":"my-child-with-selective-mutism-has-an-abilityscore-of-100-200-what-should-we-do-next","title":"Selective Mutism: AbilityScore 100–200 — What To Do Next","reason":"Same topic"},{"lang":"en","slug":"my-child-with-selective-mutism-has-an-abilityscore-of-200-300-what-should-we-do-next","title":"Selective Mutism AbilityScore 200–300: Next Steps for Parents","reason":"Same 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of words by 18 months, pointing and gesturing, responding to their name, and beginning to combine words near 24 months. Seek a check if words are very few, understanding seems delayed, or words are lost.","authority_links":[{"url":"https://icd.who.int/browse11/l-m/en","code":"6B06","label":"WHO ICD-11 — Selective mutism (6B06)"},{"url":"https://www.cdc.gov/child-development","label":"CDC — Developmental milestones"},{"url":"https://www.healthychildren.org/English/ages-stages/toddler/Pages/default.aspx","label":"AAP HealthyChildren — Toddler development"}],"last_reviewed_at":"2026-06-10T10:54:00.24648+00:00","meta_description":"At 18–24 months it's too early to diagnose selective mutism. Learn what communication to watch for, why shyness is normal, and when a check helps.","related_materials":[],"related_techniques":[]}