What are the early signs of autism in young children?

Early signs of autism in young children include reduced eye contact, delayed or different speech, not responding to their name, limited pointing or gesturing, and repetitive movements such as rocking or hand-flapping.

Communication and language

The NHS lists communication differences as some of the most noticed early signs. In a toddler, that can look like:

• starting to speak later than other children, or losing words they had already learned
• not responding to their name, even though their hearing has been checked and is fine
• using few gestures and not pointing to show you something they find interesting
• using eye contact less often, and fewer facial expressions
• repeating words or phrases (sometimes called echolalia) rather than answering

Play and social interaction

Many parents first notice that play looks different. An autistic toddler might take little part in pretend play, prefer to play alone or alongside adults rather than other children, and line toys up or set them up the same way every time. They may not bring things over to show you, or turn to share a smile when something delights them.

Repetitive movements and sensory differences

Repetitive movements (often called stimming), such as rocking, spinning or hand-flapping, are common and tend to be more intense when a child is excited or upset. A strong preference for routine, with real distress when something changes, is another frequent sign. So are sensory differences: being unusually sensitive, or unusually under-responsive, to sounds, lights, textures or tastes.

No single sign confirms autism

These are described by NICE as features that suggest possible autism, not a checklist. Autism presents differently in every child, and signs can show from around 12 months in some children or not until after their second birthday in others. Autistic girls in particular often mask, so their signs are missed more often. A clinician confirms autism by gathering a picture across all these areas, not from one behaviour. You do not need to be sure, and your child does not need a diagnosis already, to ask for help.

This page is general information, not clinical or legal advice.