A white-coated tongue is a common change, especially in older adults, and is usually not dangerous on its own. It often appears in the morning and may be linked to simple factors like dry air, mouth breathing, or reduced saliva during sleep. Many people initially ignore it, assuming it will go away—and in many cases, it does. As the body ages, however, oral changes can become more noticeable because saliva production often decreases and the immune system may respond more slowly. The tongue can act as an early indicator of overall health, reflecting hydration levels, oral hygiene habits, medication effects,...
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