Chewing on shirts, pencils, toys, and fingers is surprisingly common in five-year-olds, and it usually comes down to one of a few explanations: sensory seeking, incoming teeth, stress, or occasionally a nutritional gap. Most of the time it’s not a sign of something serious, but understanding the reason behind the chewing helps you figure out whether it needs attention and what actually helps.
Sensory Seeking Is the Most Common Reason
Children who chew on non-food items are often doing it because the pressure feels good to their jaw and facial muscles. Chewing, biting, and sucking all send deep-pressure feedback to the brain, the same type of input kids get from bear hugs or jumping on a trampoline. This input has a genuine calming effect on the nervous system, which is why your child may chew more when they’re concentrating, anxious, bored, or overstimulated.
Think of it like an adult chewing gum during a stressful meeting. Your child’s brain is still learning how to regulate its own arousal level, and chewing is a simple, effective tool it has found. Some kids naturally need more of this type of input than others. That doesn’t automatically mean something is wrong. It means their nervous system has a higher threshold for sensory stimulation and they’re actively seeking ways to meet it.
New Teeth May Be on the Way
Five is right around the age when the first permanent molars start pushing through the gums. These “six-year molars” typically erupt between ages six and seven, but the pressure and discomfort in the gums can begin well before the tooth actually breaks through. Unlike baby teeth, these molars come in behind the existing teeth, so parents sometimes don’t realize teething is happening again.
If your child seems to favor chewing on one side, rubs their jaw, or gravitates toward harder objects, gum discomfort from incoming molars is a likely contributor. Cold pressure on the gums (a chilled washcloth or cold fruit) tends to help more than topical gels. Research suggests that the massaging action matters more than any numbing ingredient.
Stress, Anxiety, and Big Emotions
Five-year-olds face a surprising amount of social and emotional pressure. Starting kindergarten, navigating friendships, adjusting to new routines, and managing separation from parents can all trigger a stress response. Chewing provides proprioceptive input that helps shift a child out of a fight-or-flight state and back toward feeling safe and grounded. If the chewing picked up around a specific change (a new school, a move, a new sibling, changes at home), the timing itself is a clue.
Some children chew more at school and less at home, or vice versa. Paying attention to when and where the chewing intensifies can reveal what’s driving it.
The ADHD and Autism Connection
Chewing on non-food items is notably more common in children with ADHD, autism, or sensory processing differences. Within a framework that occupational therapists use to understand sensory behavior, these children actively generate extra input (spinning, jumping, squeezing, chewing) to regulate their attention and arousal. Chewing specifically helps some kids focus during tasks that require sustained attention, which is why pencils and shirt collars take a beating during homework or circle time.
Mouthing non-food objects or seeking intense oral pressure can feel “organizing” to a child whose brain needs more input to stay regulated. This doesn’t mean every child who chews has ADHD or autism. But if the chewing is persistent and comes alongside other patterns (difficulty with transitions, strong reactions to textures or sounds, trouble sitting still, delayed social skills), it’s worth bringing up with your pediatrician or requesting an occupational therapy evaluation. An OT can assess your child’s full sensory profile and build a plan around their specific needs.
Nutritional Deficiencies and Pica
When a child persistently eats (not just chews on) non-food materials like dirt, chalk, paper, or paint chips for a month or more, and the behavior is beyond what’s developmentally expected, clinicians consider a condition called pica. Mouthing objects is considered normal development in children under two, but by age five it falls outside that window.
Iron deficiency (anemia), calcium deficiency, and zinc deficiency are among the most common nutritional triggers for pica. The body appears to drive cravings for non-food items as a misguided attempt to compensate for what’s missing. If your child is actually swallowing non-food materials rather than just gnawing on them, or if they seem drawn to unusual substances like dirt or clay, a simple blood test can check for deficiencies. This is especially worth considering if your child is a very picky eater or has a restricted diet.
What Actually Helps
The right approach depends on why your child is chewing, but several strategies work across most causes.
Offer Safe Oral Input
Give your child’s mouth something appropriate to work on. Crunchy raw vegetables, chewy dried fruit, sugar-free gum, and bagels all provide strong oral input. For school or situations where food isn’t practical, some families try silicone chew tools designed for kids. However, it’s worth knowing that the FDA has warned against teething and chewing jewelry for children, citing risks of choking, strangulation, mouth injury, and infection. If you choose a chew tool, look for options that attach to clothing rather than going around the neck, and supervise their use.
Add “Heavy Work” to the Day
Because chewing satisfies a need for deep-pressure input, you can partially meet that need through the rest of the body. Occupational therapists call these “heavy work” activities, and they’re simple enough to do at home:
- Wall or floor push-ups before homework or school
- Pushing hands together hard for ten seconds, then releasing
- Locking fingers together and pulling apart
- Making tight fists and then opening hands wide
- Carrying heavy items like grocery bags or a stack of books
- Jumping, climbing, or pushing against a stable surface
Building a few minutes of these activities into transitions (before school, before meals, before bed) can noticeably reduce the need for oral input throughout the day.
Address the Emotional Layer
If stress or anxiety is a factor, naming the emotion helps more than stopping the behavior. “It looks like your body needs something right now. Are you feeling worried?” gives your child language for what they’re experiencing and opens the door to other coping tools. Punishing or shaming the chewing rarely works because the child isn’t choosing the behavior consciously. Their nervous system is requesting input, and redirecting that request is far more effective than blocking it.
When the Chewing Deserves a Closer Look
Most five-year-olds who chew on things are working through a normal sensory need or a temporary stressor. But a few patterns suggest something more is going on: the child is actually ingesting non-food materials, the chewing is causing damage to their teeth or gums, it’s getting worse over time rather than better, or it comes with a cluster of other sensory or behavioral differences. In those cases, an occupational therapy evaluation can identify sensory processing issues, and a pediatrician can rule out nutritional deficiencies or other medical factors with straightforward testing.