Autism and Pica: Why Children Eat Non-Food Things (and How to Help)
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What you can do today
- Do a quick safety sweep — secure medicines, batteries, chemicals and small/sharp objects.
- Notice patterns: what does your child mouth or eat, and when (bored, anxious, understimulated)?
- Offer safe alternatives — chew toys/jewellery, crunchy snacks, oral sensory tools.
- Teach a simple 'for eating / not for eating' idea using pictures.
- Tell your doctor about the pica and ask whether to check for deficiencies.
Why do some autistic children eat non-food things?
Pica usually meets a need: sensory seeking, exploration, anxiety, communication, or occasionally low iron or zinc. It is not naughtiness. The response is safety, then meeting the need a safer way, then a medical check — in that order.
Pica usually meets a need, even if it looks puzzling. Common reasons include:
- Sensory seeking — craving a particular taste, texture or strong oral input.
- Exploration — younger children explore the world through their mouths for longer.
- Anxiety or self-regulation — mouthing or chewing to calm down (see sensory overload).
- Communication — signalling hunger, boredom or a need that's hard to express.
- Nutritional factors — occasionally linked to low iron or zinc, which a doctor can check.
Understanding the why points you to the most helpful response — usually meeting the need a safer way.
What is the first safety sweep I should do today?
Lock away medicines, button batteries, magnets, cleaning products and small sharp objects. Supervise gardens, bathrooms and bins. Keep poison-line and emergency numbers where you can see them. Environment safety buys time while you work on the why.
Safety comes before everything else:
- Secure dangerous items — lock away medicines, button batteries, magnets, cleaning products and small/sharp objects; keep an eye on plants and small toys.
- Supervise in higher-risk places (garden, bathroom, bin areas).
- Know what to do if your child swallows something dangerous — keep your poison line and emergency numbers handy.
- Watch for warning signs of choking or a blockage (pain, vomiting, not passing stools).
Making the environment safer buys you time while you work on the underlying need.
Offering safe alternatives
Aim to give your child the input they're seeking in a safe way:
- Chew tools — chewable jewellery ('chewlery'), chew toys, or chewy/crunchy safe snacks.
- Strong sensory food options — crunchy, sour or chewy foods (alongside support for fussy eating).
- Oral-motor and sensory tools — straws, vibrating brushes, drinking thick drinks through a straw.
- Meet the underlying need — more movement and sensory play if it's about stimulation; calming strategies if it's anxiety.
- Teach the difference — a clear, repeated 'this is for eating / this is not for eating' with picture cards.
An occupational therapist or speech and language therapist can help tailor this to your child.
When to see a doctor
Always mention pica to your doctor, even if it seems mild. They may:
- Check for deficiencies such as low iron, which can sometimes drive pica.
- Refer to specialists — an OT or SLT for sensory and feeding support, or others as needed.
- Advise on safety and what to do in an emergency.
Pica often reduces with the right mix of safety, meeting the sensory need, and addressing any medical cause — but it's a team effort, so don't try to manage it alone.
What do I do today if my child eats non-food items?
Safety first: remove the most dangerous items, tell your GP, and do not treat pica as 'naughty eating'. Pica is more common in autistic children and can be medical (iron, zinc, constipation) as well as sensory. Get medical advice; this page is not a treatment plan.
Keep a list of what is eaten and any tummy symptoms. Pair with eating and constipation. Offer safe sensory substitutes only after a clinician has ruled out urgent risk. Who should skip this: delaying A&E for a battery, magnet or sharp object because you are still reading.
Is this pica or ordinary toddler mouthing?
Toddlers explore with their mouths. Pica is regularly eating non-food after that stage, or eating risky items at any age. Frequency, what is eaten, and medical risk decide how fast you act — not whether it looks 'autistic'. Always mention it to a doctor.
Write a two-column list: what went in the mouth, and what was actually swallowed. Pair this page with fussy eating and constipation — pain and restriction can drive more mouthing. An occupational therapist can help with oral sensory substitutes after urgent risk is ruled out. For when a tummy symptom is 111-or-999 rather than wait-and-see, see HealthAnswers children's health.
Frequently asked questions
What is pica?
Pica is regularly eating things that aren't food — such as paper, soil, stones, fabric or chalk. It's more common in autistic children and can have sensory, emotional or occasionally nutritional causes.
Why does my autistic child eat non-food things?
Often to meet a sensory need (taste, texture, oral input), to explore, to self-regulate when anxious, or to communicate a need. Occasionally it's linked to a nutritional deficiency, which a doctor can check.
Is pica dangerous?
It can be — risks include choking, poisoning, and blockages. Swallowing items like button batteries, magnets or chemicals is an emergency. Keeping dangerous items out of reach is the first priority.
How do I stop my child eating non-food items?
Make the environment safe, work out what need it meets, and offer safe alternatives (chew tools, strong-sensory snacks, oral sensory toys). Teach 'for eating / not for eating', and see your doctor about causes and support.
Sources and content notes
Published by Autism Parent Guide. This is general educational information.
Clinical review involvement
General practitioner (GP) — name withheld
A general practitioner (GP), who prefers to remain anonymous, has been involved in reviewing the site since its development began and as content has been added. This describes ongoing involvement in the site. Individual article review dates and the scope of each review are not currently published.
References for this guide
- Understanding and managing picaNational Autistic Society
- Eating: a guide for all audiencesNational Autistic Society
Content updated . This date records an editorial change, not a clinical review. Read our editorial policy or report a correction.
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Not medical advice. This article is general information, not a substitute for professional assessment. Every child is different — always talk to a qualified professional about your individual child.