10 Causes of Dry Mouth
Cause #4: Mouth Breathing
Usually, we will breathe through our nostrils which should be more than sufficient. Sometimes, though, we might experience nasal congestion which means we will need to breathe through our mouths. Some people might also have medical conditions which means they will need to breathe through their mouths more than their nostrils.
Breathing through our mouths will mean that air is constantly being passed over our saliva, encouraging it to evaporate. This can be made worse in hot, dry climates and air-conditioning can also encourage a dry mouth. Many people will find that they wake up with a dry mouth if they breathe through their mouths when sleeping.
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