Swallowing ;) I learned from ortodontist that the reason I don’t have nice teeth arch and the reason that I have trouble with pills is because of „infantile swallowing”, basically pressing tongue to lower teeth and not lower palate. Learning this solved so many of my problems. This lowers efficiency of breathing and make you snore and might be related to sleep apnea and this makes you tired and depressed so please check your kids.
Your tongue shouldn't push against your teeth when you swallow (called "tongue thrust swallowing"). Instead, it should press against the roof of your mouth, behind your upper teeth.
Ideally, it's something that is noticed and corrected in childhood. Or, like me, you end up in braces (again) as an adult, because your tongue pushed your previously corrected teeth all over the place over the years.
