Oral Health

Salivary flow falls to its lowest point during sleep in everyone, so a drier mouth overnight is normal physiology. The real question is what is amplifying it: mouth breathing, nasal obstruction, snoring and sleep apnoea, medication, alcohol or dehydration. Here is every cause, how to tell which one is yours, and the fixes that actually work.

Over 400 commonly prescribed medications cause dry mouth as a side effect — and dry mouth is the fastest route to bad breath and decay.