Pica is an eating disorder. Sometimes, our brains get a little mixed up and tell us to eat things that aren’t food. This is called Pica (say: pee-ka or pie-ka).
People with Pica might want to eat things that are not seen as food and don’t help us to stay healthy, like: glass, earth, soil, clay, lead or ice.
What is it like for siblings if their brother or sister has pica?
Lots of siblings have good relationships with brothers or sisters who have Pica, but having a brother or sister with Pica can feel a bit confusing at times. You might notice them eating things that don’t seem like food and wonder why they’re doing this, worry because it doesn’t seem safe for them and possibly be embarrassed if this is in front of people who aren’t family or friends.
What Causes It?
Doctors aren’t always sure why Pica happens. It isn’t something you “catch” like a cold. But it might be because:
- They have a condition like autism or ADHD or have suffered a brain injury.
- The person’s body is missing something, like iron, zinc or other things that help the body grow strong and healthy.
- They’re feeling worried, bored, or stressed.
- Sometimes for pregnant women or people with epilepsy.
What Does It Mean?
Having Pica means your body or brain is working differently.
What Treatment Is There?
Medicine – Sometimes medicine can help if Pica is connected to a learning disability or another condition.
Positive rewards – Some children get rewards when they eat safe, healthy food, like stickers or extra playtime to help them learn to avoid it.
Therapy – The main way to treat Pica is through therapy. A helper (like a therapist or counsellor) can teach ways to stop the cravings and make better choices.
Extra safety – For some children adults might remove unsafe items and watch closely to help them stay safe.
Pica doesn’t last forever for many children.
In many cases, it goes away on its own after a few months. But if someone needs help, there are safe treatments that can really make a difference: Doctors might check if their body needs more iron or other vitamins and help them eat foods that make them feel better.
This information has been read and approved by the National Pica Advisory Service, November 2025