3. Dehydration
Sometimes the cause is simple: your body is not getting enough fluids.
While you sleep, your body continues to lose water through breathing, sweating, and normal metabolism. Going to bed even mildly dehydrated can leave you waking up with a noticeably dry mouth and throat.
The solution is not drinking large amounts of water right before bed—which may interrupt sleep—but maintaining steady hydration throughout the day.
4. Aging
As people age, saliva production naturally declines. Adults over 60 are especially prone to dry mouth due to the combined effects of aging, medications, and chronic medical conditions.
Because saliva protects against cavities, infections, and oral discomfort, consistent oral hygiene and routine dental visits become increasingly important with age.
5. Underlying Medical Conditions
Persistent dry mouth can sometimes signal a deeper health issue.
The Mayo Clinic notes that conditions such as:
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Diabetes
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Stroke
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Alzheimer's disease
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HIV/AIDS
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Sjögren's syndrome
can interfere with saliva production. In some cases, dry mouth may be an early sign of an autoimmune disorder. If symptoms continue despite good hydration and oral care, medical evaluation is important.
