Can my next child also have Separation Anxiety Disorder?

One child's worries do not write your next child's story — and a little understanding goes a long way.

In short

It is possible, but it is not destined. Separation Anxiety Disorder does have a partly inherited and family-environment component, so a younger sibling has a somewhat higher chance than the average child — but most siblings of an anxious child do not develop the disorder. Temperament, life experiences and the calm, predictable parenting you already give all shape the outcome. Awareness is your advantage, not a reason to worry in advance.

What raises and lowers the chance

Research shows anxiety conditions tend to run in families through a mix of genes and shared home atmosphere — not a single "anxiety gene". A few things matter:

• Temperament — some babies are naturally more cautious or slow-to-warm; this is a tendency, not a diagnosis.
• Modelling — children quietly copy how the adults and older siblings around them handle goodbyes and stress.
• Predictability — calm, consistent routines around separations (a short, confident goodbye, a reliable return) build a child's trust that you always come back.
• Each child is their own person — even with the same parents and home, siblings often differ enormously in how they handle separation.

Gentle separation worry is also a completely normal stage of development, especially between about 8 months and 3 years. It only becomes a concern when it is intense, lasting and getting in the way of everyday life — sleep, school, play or friendships.

When to seek a check

Consider a developmental check if your child's distress at separation is far stronger or lasts far longer than other children their age, includes repeated physical complaints (tummy aches, headaches) before separations, refusal to go to school or sleep alone, or persistent fears of harm coming to you. Early, warm support works very well — and the earlier the gentler.

The Pinnacle way

AbilityScore® is part of Pinnacle’s developmental assessment. Diagnosis, where needed, requires an appropriately qualified healthcare professional — never from an app, a checklist or because of an older sibling's history. If you'd like reassurance, our clinicians can build a calm, complete developmental profile of your younger child and, where helpful, offer supportive behavioural and emotional therapy. You can also explore more on our main resources for families navigating worry.

Trusted sources

WHO ICD-11 (Separation anxiety disorder); American Academy of Pediatrics (HealthyChildren.org) guidance on childhood anxiety and normal separation stages; NICE guidance on anxiety in children and young people.

Next step — Worried for your younger child? Book a gentle developmental check with a Pinnacle clinician.

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