Autism and Pica: Why Children Eat Non-Food Things (and How to Help)

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.

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.

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.

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.