Have you ever wondered why your child chews their shirt, bites their nails, mouths their toys or seeks out the crunchiest foods they can find?
It might look like a random habit, but there is actually some fascinating science behind why chewing can feel regulating for the nervous system.
Why might chewing quiet a busy brain?
Chewing provides strong, rhythmic sensory input through the jaw. This activates the trigeminal nerve (cranial nerve V), which carries sensory information from the face, mouth and jaw to the brain. The jaw also provides muscle and joint input, sometimes called proprioceptive input. This is the same type of sensory information we receive when we push, pull, lift, squeeze or bite.
For some children, this strong and predictable input can help their nervous system regulate their level of alertness and focus their attention. The sensory input may give the brain something predictable to focus on, so thoughts and surroundings can feel less overwhelming or distracting. This may be particularly noticeable for children with ADHD, who can seek out movement, touch, sound or oral input to help regulate their attention and arousal.
So when your child is chewing their sleeve while doing their homework, they may not simply be “being distracted.” They may actually be using sensory input to help their brain concentrate.
Are they hungry?
Chewing isn’t always about hunger.
Your child may be seeking sensory input because their nervous system is looking for something that helps them feel organised and regulated.
You might notice increased chewing when they are:
- concentrating
- sitting still for a long time
- feeling overwhelmed
- tired
- excited
- anxious
- transitioning between activities
- trying to stay alert
This might look like chewing:
🥕 Crunchy foods
👕 Shirt collars or sleeves
🧸 Toys
✏️ Pencils
💅 Fingernails
🖐️ Fingers or hands
💍 Chewable jewellery
Although these behaviours can look very different, they may all be ways of seeking oral sensory input.
So, should we stop them chewing?
Not necessarily.
Instead of simply asking:
“How do we stop the chewing?”
we can ask:
“What is their body telling us they need?”
If chewing is helping your child regulate, removing it without providing another way to meet that sensory need may make things more difficult.
Our goal isn’t to take away a strategy that is helping. It’s to understand the need behind it and find safe, functional ways to meet that need.
This might include:
- offering crunchy or chewy foods where appropriate
- providing safe oral sensory tools
- using purpose-designed chewable jewellery
- incorporating movement breaks
- providing activities involving pushing, pulling or carrying
- adjusting the sensory environment
- supporting regulation before challenging activities
Look beyond the behaviour
At Learn For Life, we believe children’s behaviours are meaningful forms of communication.
Chewing may be your child’s way of saying:
“I need more sensory input.”
“This helps me concentrate.”
“I’m feeling overwhelmed.”
“This helps my body feel organised.”
When we become curious about why a child is doing something, we can better understand what their nervous system needs.
And when we meet that need in a safe and supportive way, we’re not just trying to stop a behaviour.
We’re helping children feel regulated, participate and thrive in learning and life.
Learn For Life | Supporting children to thrive in learning and life.