Separation anxiety, and what it means

The baby who was happily passed to anyone at six months and screams at their grandmother at nine has not become difficult — they have acquired a new cognitive capability.

Why it happens

Two developments coincide.

Object permanence: the understanding that people and things continue to exist when out of sight, which develops through the second half of the first year.

Which means a baby now knows their parent still exists somewhere, and can therefore miss them — before this, out of sight was closer to out of existence.

And attachment: by this age the baby has formed specific preferences for particular caregivers, which is exactly what attachment theory predicts and which is a marker of healthy development.

Stranger wariness typically appears around the same time, for related reasons.

The timeline

Approximate and variable.

Onset commonly around six to eight months.

Peak intensity commonly between ten and eighteen months.

Gradual reduction through the second and third years, with resurgences at transitions — starting childcare, a new sibling, moving house, illness.

Some resurgence around bedtime is common and lasts longer than the daytime version.

How it looks

Crying or clinging when a parent leaves the room.

Distress at bedtime that was not there before.

Night waking and wanting company.

Refusing familiar people, including grandparents, which is upsetting for them and worth explaining.

Wanting to be held constantly.

And checking back — crawling away and returning repeatedly, which is the baby using the parent as a secure base and is exactly what they should be doing.

What helps

Approaches that reduce the intensity without ignoring it.

Practise short separations at home: leaving the room and calling back, playing peekaboo and hiding games, which teach that people return.

Always say goodbye rather than slipping out, which seems easier and reliably makes it worse — a child who does not know when a parent might vanish becomes more vigilant.

Keep goodbyes short, warm and consistent, with the same phrase and routine each time.

Hand over to a specific person rather than leaving the child alone in a room.

Leave a comfort object where the child has one.

Give a simple, honest explanation appropriate to their understanding, and be consistent about the timing of return.

And do not prolong the departure, since extended goodbyes generally increase distress for everyone.

Starting childcare

Where this matters most practically.

Settling-in sessions, building up gradually, are standard practice for good reason.

A key person system, where one adult is primarily responsible, supports the formation of a secondary attachment and is a feature of good quality provision.

Most children who cry at drop-off settle within minutes, and asking staff to tell you honestly how long it took — or to message once settled — is reasonable and usually reassuring.

Expect a period of increased clinginess at home and disrupted sleep during the transition, which settles over weeks.

And expect a resurgence after holidays and illness, which is normal.

Bedtime

Frequently the last aspect to resolve.

A consistent routine matters more during this period than at any other.

Extra connection before bed — a longer story, more cuddling — frequently reduces the difficulty at the point of separation.

Gradual approaches, where a parent stays and reduces their involvement over days, suit this age well.

And responding to night waking during a separation anxiety phase does not create permanent habits, since the phase itself is temporary.

What not to do

Punish or shame the clinginess, which increases anxiety.

Sneak away.

Make the goodbye dramatic or emotional, since children read adult anxiety accurately.

Force interaction with a person the child is wary of, which entrenches the wariness.

Or conclude that the child is being spoiled by responsiveness — the evidence points the other way, with responsive care being associated with more secure attachment and, ultimately, more confident independence.

When it is more than typical

Worth raising.

Distress so severe and prolonged that the child cannot be comforted by anyone, over an extended period.

Anxiety that persists well into the preschool years and interferes with normal activities, which may indicate separation anxiety disorder and is treatable.

Physical symptoms — repeated vomiting or headaches — around separations in older children.

Regression across other areas.

And a child who shows no preference for familiar caregivers at all, or who is indiscriminately affectionate with strangers, which is a different picture and warrants assessment.

General information only, not medical advice. Consult your health visitor or a qualified clinician if separation anxiety is severe or persistent.