If your child chews with their mouth open, keeps their mouth open while chewing, or struggles to close their lips during meals, you may be wondering whether it is a habit, a sensory pattern, or an oral motor difficulty. Get clear, practical next steps tailored to what you are seeing.
Share what happens during meals, and get personalized guidance to help you understand whether your child’s open mouth chewing may be related to oral motor skills, eating habits, or another feeding challenge.
Open mouth chewing in kids can happen for different reasons. Some children have difficulty coordinating their lips, jaw, and tongue while eating. Others may have low oral awareness, sensory differences, nasal congestion, or learned mealtime habits that make it harder to keep the mouth closed while chewing. If your toddler chews food with mouth open or your child keeps mouth open while chewing across many foods and meals, it can be helpful to look more closely at the pattern rather than assuming they will simply outgrow it.
Your child chews with mouth open on most bites, even when reminded to close their lips.
Food may fall out, chewing may look inefficient, or your child may seem to move food around without strong lip closure.
Open mouth chewing behavior in children may appear alongside picky eating, slow eating, overstuffing, or difficulty managing certain textures.
A child oral motor open mouth chewing pattern can reflect difficulty coordinating the lips and jaw during chewing.
Some children do not notice that their mouth is open while eating, or they may seek certain chewing sensations.
Nasal congestion, enlarged tonsils, or mouth-breathing patterns can make closed-mouth chewing harder during meals.
Understand whether your child’s pattern looks more like a habit, a developmental skill gap, or a feeding issue worth addressing.
Get guidance that fits your child’s age, mealtime behaviors, and the foods that seem hardest to manage.
Learn which signs may point to a need for professional feeding, oral motor, or medical follow-up.
There is not one single reason. A child may chew with an open mouth because of oral motor weakness or coordination challenges, sensory differences, mouth-breathing, congestion, or a learned mealtime habit. Looking at the full pattern helps identify the most likely cause.
Some younger toddlers are still developing chewing skills, but if toddler open mouth chewing happens often, continues over time, or appears with other feeding difficulties, it may be worth a closer look. Persistent open-mouth chewing can sometimes signal an oral motor or sensory issue.
If your child can close their mouth when reminded and does so consistently, habit may play a bigger role. If they seem unable to maintain lip closure, lose food while chewing, struggle across many textures, or show other feeding concerns, oral motor factors may be involved.
The best approach depends on the reason behind the behavior. Simple reminders alone may not help if your child has oral motor or sensory challenges. Personalized guidance can help you choose strategies that match your child’s specific eating pattern.
Not always, but it is worth paying attention if it happens frequently, affects many foods, causes messy eating, or comes with gagging, overstuffing, slow chewing, or picky eating. Those signs can suggest a broader feeding or oral motor concern.
Answer a few questions to better understand why your child chews with their mouth open and get personalized guidance for the next steps that may help at mealtimes.
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Oral Motor Difficulties
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