Ask parents of autistic children what they first noticed and they rarely describe a symptom. They describe a feeling — that something in the back-and-forth was different, that their child seemed content to be alone in a way other children were not, that they had to work harder to be noticed.
That instinct is worth taking seriously. It is also worth translating into things a clinician can act on.
The signs that carry the most weight
Response to their name. Not every time — no toddler answers reliably when absorbed. But most children, most of the time, will turn when a familiar voice says their name at close range with no other cue.
Pointing to show, not only to get. Almost all toddlers point at what they want. The more informative behaviour is pointing at something interesting purely to make you look at it too. That is sharing attention, and it is a foundation.
Checking your face. A child sees something surprising and glances at you to see what you make of it. This one is easy to miss because it is so quick, and it tells you a great deal.
Bringing things over. Not to have them opened or fixed. Just to show you.
Back-and-forth. Peekaboo, rolling a ball, copying a silly noise. Whether the child takes turns in something with no purpose except the interaction itself.
The signs that carry less weight alone
Lining up toys. Hand flapping when excited. Spinning wheels. Strong preferences about food or clothing. Not making much eye contact with strangers.
Every one of these is common in children who are not autistic, and every one appears near the top of internet lists because it is easy to describe. On its own each means little. What matters is whether they sit alongside differences in the sharing behaviours above — and whether they are persistent rather than a phase.
What should not wait
One pattern deserves a prompt appointment rather than watchful waiting: losing skills the child previously had. Words that have gone, gestures that have stopped, social interest that has faded. Regression is uncommon and it is always worth a proper look, whatever the eventual explanation.
Why age matters less than you would think
Parents often ask how young is too young to ask. Reliable identification gets easier as a child gets older, and very early pictures can genuinely change. But that is an argument for asking early and being reassessed, not for waiting.
Nothing about an early conversation commits you to a label. It commits you to a baseline — and if the picture does change, someone will know what it changed from.
What actually helps in the meantime
Almost everything that helps an autistic toddler also helps a toddler who turns out not to be autistic: getting down to their level, following what they are interested in rather than redirecting them, narrating simply, leaving pauses for a response, and building interaction into things they already enjoy.
None of it requires a diagnosis, and none of it is wasted if the answer turns out to be no.
Where we fit
Our page on autism covers the clinical picture, and how we assess sets out what an appointment involves — including what we do when a child is very young and the picture is still forming. We see children across our centres in India and the UK.
This article is general information. It is not a diagnosis and not advice about your individual child. If your child has lost skills they previously had, speak to a doctor promptly.