Here’s what to actually do if your child sleeps with their mouth open
If a child persistently breathes through their mouth during sleep, paediatricians recommend monitoring sleep quality, checking for snoring and seeking professional assessment.
Many parents have noticed their child sleeping with their mouth open and brushed it off as a cute, quirky habit. While occasional mouth breathing due to a cold or allergies is harmless, persistent mouth breathing during sleep can sometimes signal that a child isn’t breathing optimally, so it’s worth knowing what to actually do about it.
The first and most important step is to seek professional help. A paediatrician can assess the root cause, whether that’s a blocked nasal passage restricting the airway or the tongue resting lower in the mouth instead of against the roof of the palate.
Beyond medical assessment, parents can support healthier breathing at home by monitoring their child’s sleep quality, checking for snoring, keeping the bedroom free of allergens and encouraging good hydration. These steps matter because untreated mouth breathing can fragment sleep, reduce how efficiently oxygen is delivered, and, according to the American Academy of Pediatrics, affect cardiovascular health, growth and cognitive functioning over time.
Chronic mouth breathing has also been linked to changes in facial and dental development, including a narrower upper jaw and misaligned teeth, as well as behavioural issues like hyperactivity, irritability and distractibility caused by poor-quality sleep.
The encouraging news is that many airway and breathing issues can be identified and managed early, once parents start paying attention to how their child breathes while asleep.
Image: Wikimedia Commons/by MIKI Yoshihito
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