Breathing through your mouth instead of your nose can dry out saliva and lead to irritation. This often happens due to nasal congestion, allergies, or sleep habits.
3. Certain Medications
Many medications can reduce saliva production, including antihistamines, antidepressants, blood pressure drugs, and diuretics. This side effect is a common cause of chronic dry mouth.
4. Sleep Apnea
Sleep apnea is a condition where breathing repeatedly stops and starts during sleep. It often causes mouth breathing and may lead to persistent nighttime dry mouth along with snoring and fatigue.
