Kids chew on things for a wide range of reasons, from teething pain and sensory needs to stress relief and simple exploration. It’s one of the most common behaviors parents notice, and in most cases it’s a normal part of development. Understanding what’s driving the chewing helps you figure out whether it’s something your child will grow out of, something that needs a safer outlet, or something worth bringing up with a pediatrician.
Teething Lasts Longer Than Most Parents Expect
The most straightforward explanation for chewing in young children is teething, and it doesn’t end when the front teeth come in. First molars typically erupt between 13 and 19 months, and second molars push through between 23 and 33 months. That means teething-related chewing can continue well past a child’s second birthday. The pressure of biting down on something helps counteract the discomfort of teeth breaking through the gums, so kids instinctively reach for whatever is nearby: toys, furniture edges, their own fingers.
Once the full set of primary teeth is in (usually by age 3), teething is off the table as a cause. If chewing persists beyond that point, something else is going on.
Chewing as Sensory Input
The jaw is packed with muscles and joints that feed information back to the brain about pressure, force, and body position. This feedback loop, part of what’s called the proprioceptive system, helps kids develop body awareness and feel grounded. Chewing delivers intense input to these receptors, which is why it can be deeply calming for children who feel overwhelmed or understimulated by their environment.
Some kids are sensory seekers. They crave more input than their daily activities provide, so they chew on pencils, shirt collars, sleeves, or toy parts to fill that gap. Others are sensory avoiders who get overwhelmed easily, and chewing gives them a single focal point that blocks out competing stimulation. Either way, chewing serves as a self-regulation tool, not a bad habit.
Children on the autism spectrum or with sensory processing differences are especially likely to develop oral habits. Chewing functions as a form of stimming: repetitive behavior that creates a feedback loop to regulate emotion. It’s calming, it’s comforting, and it gives the nervous system something predictable to latch onto. Some kids also seek out intense flavors like spicy or sour foods for the same reason. They’re chasing sensation their body tells them it needs.
Stress, Anxiety, and Emotional Regulation
Think about adults who chew gum during a stressful meeting, bite their nails before a presentation, or click a pen while thinking. Kids do the same thing, just less neatly. Chewing is a physical outlet for nervous energy, similar to fidgeting or bouncing a leg. It activates the jaw muscles rhythmically, which has a genuinely calming effect on the nervous system.
If you notice your child’s chewing ramps up during transitions (starting school, moving, a new sibling, changes in routine), stress is a likely driver. The behavior itself isn’t harmful, but it’s worth paying attention to what’s happening around it. A child who suddenly starts chewing on things after a period of not doing so may be telling you something about how they’re feeling, even if they can’t put it into words yet.
Nutritional Deficiencies and Pica
Pica is the persistent eating or chewing of non-food items like dirt, paper, chalk, or paint chips. It affects roughly 23% of autistic children between ages 2 and 5, though it can occur in any child. One theory links pica to deficiencies in iron, zinc, calcium, or selenium, though research has had mixed results. A study published in the Eastern Mediterranean Health Journal found no significant association between pica and iron deficiency specifically, but acknowledged that other micronutrient deficiencies weren’t measured.
If your child is consistently seeking out and eating non-food substances (not just mouthing or chewing, but actually swallowing), it’s worth having their nutrient levels checked. Pica carries real health risks depending on what’s being consumed.
Safety Risks of Chewing on Household Objects
The bigger concern with chewing isn’t usually the behavior itself but what ends up in your child’s mouth. Lead remains a real hazard in everyday items. The CDC notes that imported toys, antique toys, and children’s jewelry may contain lead. It’s used to soften plastic, brighten colors, and add weight to jewelry. Over time, the chemical bond between lead and plastic breaks down when exposed to sunlight, air, or detergents, forming a dust that children ingest by touching the item and then putting their fingers in their mouths.
Older items made of tin, brass, or pewter are particularly risky. Painted furniture, ceramic pieces, and vintage toys can also be sources. If your child chews frequently, audit what they have access to. Stick to items specifically designed to be chewed on, and avoid anything with unknown paint, small detachable parts, or soft plastic that wasn’t manufactured with food-grade standards.
Effects on Teeth and Jaw Development
Persistent non-nutritive oral habits (chewing, sucking, biting on hard objects over long periods) can affect dental development. The main risks include anterior open bite, where the front teeth don’t meet when the mouth is closed, and palatal narrowing, where the roof of the mouth becomes too narrow. These changes can also delay speech development by altering the structures involved in forming sounds.
Occasional chewing on a pencil or a teething toy isn’t going to cause orthodontic problems. The concern is with sustained, forceful chewing on hard objects over months or years. If your child’s chewing is intense and constant, a pediatric dentist can check whether it’s affecting their bite.
Safer Outlets for Chewing
Rather than trying to eliminate chewing entirely, redirecting it to something safe is usually more effective. Chewable jewelry (sometimes called “chewelry”) is designed for exactly this purpose. These are necklaces, bracelets, zipper pulls, and pencil toppers made from food-grade silicone that give kids the oral input they’re looking for without damaging their teeth or exposing them to harmful materials. They’re discreet enough for school-age kids to use in a classroom without drawing attention.
Crunchy and chewy snacks can also help. Carrots, dried fruit, bagels, or pretzels provide legitimate oral input. For kids who are sensory seekers, alternating between crunchy and chewy textures throughout the day can reduce the urge to chew on non-food items. Blowing bubbles, drinking thick smoothies through a straw, and blowing up balloons also engage the oral muscles in ways that satisfy the same need.
When the Behavior Warrants a Closer Look
Most chewing is developmentally normal and resolves on its own or responds well to simple redirection. But certain patterns suggest it’s worth getting a professional perspective. Kennedy Krieger Institute identifies several red flags worth watching for: concerns about growth, meals consistently taking longer than 30 minutes, missing oral motor milestones, and persistent coughing or choking during eating.
Beyond those feeding-specific signs, consider how much the chewing interferes with daily life. A child who can’t get through a school day without destroying their shirt collar, who chews to the point of injuring their gums or lips, or who eats non-food items regularly may benefit from an evaluation by an occupational therapist. OTs specialize in sensory processing and can create a “sensory diet,” a personalized plan of activities that gives the child’s nervous system what it needs so the chewing becomes less urgent. For kids on the autism spectrum, this kind of support can be particularly helpful in building a toolkit of self-regulation strategies that work across different settings.