# When should I worry about regression at 18-24 months?

Canonical: https://pinnacleblooms.org/ask/when-should-i-worry-that-my-18-to-24-month-old-might-have-developmental-regression
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

Between 18 and 24 months, regression means losing skills a child clearly had — words, waving, eye contact, play or steady walking. Unlike taking longer to learn, this is going backwards from a known baseline, and at this age it always deserves a prompt developmental check rather than waiting. Most causes are far more manageable when reviewed early.

*If your toddler seems to be slipping backwards — losing words, waves or skills they clearly had — your instinct to pay attention is exactly right.*

## In short
You should seek a prompt developmental check whenever your 18-to-24-month-old **loses a skill they had clearly mastered** — words that stop, waving or pointing that fades, eye contact or play that drops away, or steady walking that wobbles. Unlike a slow learner who is simply taking longer, [developmental regression](/developmental-regression) means going *backwards* from an established baseline, and at this age that always deserves prompt clinician review rather than waiting it out. This is a recognition flag, not a diagnosis — and most causes are far more manageable when looked at early.

## What to watch between 18 and 24 months
Regression is the loss of skills your child *had* and then stopped using. Between 18 and 24 months, watch for:

- **Language** — words they used regularly that quietly disappear, or no longer turning to their name.
- **Social** — less eye contact, fewer shared smiles, or losing interest in pointing and showing you things.
- **Play** — play that was varied becoming narrow or repetitive.
- **Motor or self-care** — losing steadiness on their feet, hand skills, or hand use they had managed.

A plateau (skills holding still while peers move on) is worth a watchful note. A genuine *loss* of established skills is a stronger signal — bring it forward sooner rather than later. Trust a clear before-and-after change over any single off day; toddlers have tired weeks, but true regression persists across days and settings.

## When to act
Act **now**, not in a few weeks, if your child has lost words, social connection, play or motor skills they clearly had before — especially if more than one area is affected, or the change has lasted beyond a couple of weeks. Early review lets a clinician look first for any treatable cause behind the change and build your child's own developmental baseline.

## The Pinnacle way
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 online description or a single observation. Our clinicians look first for any cause behind a regression, map your child's strengths, and shape a gentle plan around them. If lost words are the worry, our [speech therapy](https://www.pinnacleblooms.org/top-speech-therapy-center-india-proven-improvement-rate) team can begin warm, structured support straight away. The aim is clarity and a way forward — not a label.

## Trusted sources
WHO ICD-11 framework for neurodevelopmental conditions; American Academy of Pediatrics developmental surveillance guidance; CDC developmental milestones and "Learn the Signs, Act Early" resources.

**Next step —** Trust what you've seen. [Book a developmental assessment](https://www.pinnacleblooms.org/enroll-autism-speech-aba-therapies-india) with a Pinnacle clinician so any real loss of skills is reviewed promptly.

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.

## Sources
- CDC milestones & Learn the Signs, Act Early: https://www.cdc.gov/child-development
- AAP developmental surveillance guidance: https://www.healthychildren.org/English/MotorDelay/Pages/default.aspx
- WHO ICD-11 neurodevelopmental framework: https://icd.who.int/

## Connected topics and perspectives
- Conditions: https://pinnacleblooms.org/ask/conditions
- Parent: https://pinnacleblooms.org/ask/lens/stakeholder/parent
- Toddler-18-24: https://pinnacleblooms.org/ask/lens/age/toddler-18-24
- Context: https://pinnacleblooms.org/ask/lens/domain/context
- Concern: https://pinnacleblooms.org/ask/lens/intent/concern
- Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen
- Special Education: https://pinnacleblooms.org/ask/lens/route/special-education
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

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### Recognise signs & concerns
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- Can Developmental Regression Be Cured?: https://pinnacleblooms.org/ask/can-developmental-regression-be-cured
- Can Developmental Regression Be Prevented?: https://pinnacleblooms.org/ask/can-developmental-regression-be-prevented
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- What are the early signs of Developmental Regression?: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-developmental-regression
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### Explore causes & influences
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### Explore therapy & support
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- How Is Developmental Regression Diagnosed in a Child?: https://pinnacleblooms.org/ask/how-is-developmental-regression-diagnosed-in-a-child
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- AbilityScore 100–200 with Developmental Regression — What to Do Next: https://pinnacleblooms.org/ask/my-child-with-developmental-regression-has-an-abilityscore-of-100-200-what-should-we-do-next
- Developmental Regression & AbilityScore 200–300 — What to Do Next: https://pinnacleblooms.org/ask/my-child-with-developmental-regression-has-an-abilityscore-of-200-300-what-should-we-do-next
- Developmental Regression with an AbilityScore of 300–400: What to do next: https://pinnacleblooms.org/ask/my-child-with-developmental-regression-has-an-abilityscore-of-300-400-what-should-we-do-next
- Developmental Regression with an AbilityScore of 400–500: what to do next: https://pinnacleblooms.org/ask/my-child-with-developmental-regression-has-an-abilityscore-of-400-500-what-should-we-do-next
- Developmental Regression with an AbilityScore of 500–600: What to Do Next: https://pinnacleblooms.org/ask/my-child-with-developmental-regression-has-an-abilityscore-of-500-600-what-should-we-do-next
- Developmental Regression with an AbilityScore of 600–700: Next Steps: https://pinnacleblooms.org/ask/my-child-with-developmental-regression-has-an-abilityscore-of-600-700-what-should-we-do-next

### At home & in everyday life
- Supporting Your Child with Developmental Regression at Home: https://pinnacleblooms.org/ask/how-can-i-support-my-child-with-developmental-regression-at-home