What can I say when I do not know what is wrong?

“What is wrong?” is a reasonable question. After the fifth repetition, it can become one more thing the child cannot do.

You do not need the explanation before you can respond usefully.

Say what you know

Try:

Something is hard. You do not have to explain it yet.

I can see your body needs more space. I am moving back.

I do not know what happened. I am here, and we can work it out later.

These phrases acknowledge the change without deciding that the child is angry, anxious, tired or avoiding something. NICE guidance asks practitioners to consider communication, health, environment, routine and other possible factors when autistic children show behaviour that challenges ^[1]. One visible reaction can have several plausible explanations.

Offer a small way to answer

Under pressure, an open question may be too large. Offer two options and leave room for neither:

Space or company? You can point, or I will wait here.

Does something hurt, or is it too much around you? It can be something else.

Do you want help, a break, or no questions?

Use the child's familiar signs, pictures, writing or device. “Do not know” is a valid answer, not refusal to cooperate. The guide to when behaviour replaces words helps build a faster message for repeated situations.

Make one change, then pause

Reduce sound, stop talking, move the task away, offer water or make a route to the toilet available. Do not change six things while watching closely for a reaction; that can add pressure and makes it harder to learn what helped.

Say what you are doing:

I am turning the music off. I will sit by the door for five minutes.

Do not promise “everything is fine” when you do not know that. Offer something you can keep: “You will not have to solve this alone.”

Avoid making the child defend your guess

“You are upset because school was difficult” may sound empathic, but it can leave a child choosing between agreeing with the adult and finding enough language to correct them.

Put uncertainty into the sentence:

I wonder if something at school is still with you. I could be wrong.

Avoid “calm down”, “there is nothing to be upset about” and “tell me now or I cannot help”. Help does not depend on a complete account. Nor should adults use a string of questions as disguised reassurance: “Nobody hurt you, did they?” can make an important disclosure harder.

If you need to check safety, ask clearly and give the child a low-language route to answer. Then pause long enough for processing.

Keep health and safety in view

If the change is sudden, physical or unlike the child's usual distress, check whether pain or illness may be involved. Seek medical advice when concerned. Act immediately if anyone is unsafe; a clear explanation can wait.

NICE learning-disability guidance includes receptive and expressive communication, health, environment and risk within assessment rather than expecting behaviour to explain itself ^[2]. Its clinical population is specific, but the practical lesson is broad: do not make one guessed motive carry the whole decision.

Return later without running an interrogation

When the child is settled, reconstruct a short sequence:

We arrived, the room had changed and I asked you to sit by the door. You covered your ears and left. What part should we change next time?

They may correct your account, choose one detail or still not know. Record the observation and try one safe change. Understanding may grow across several occasions.

Your job in the hardest minute is not to produce the perfect interpretation. It is to show the child that uncertainty does not remove support.

Sources and further reading

1. [1] NICE. Autism spectrum disorder in under 19s: support and management (accessed 4 August 2026).
2. [2] NICE. Challenging behaviour and learning disabilities: prevention and interventions (accessed 4 August 2026).