
Experiencing a dry mouth (or tongue) is usually a sign that your mouth is having a difficult time doing its core job, which is making saliva. Sometimes, a dry mouth can also come up if you have a viral infection or a possible autoimmune flare-up.
Dehydration, use of medications, or bad eating habits, which can all happen with a viral infection can also cause dry mouth.
Apart from this, having a dry mouth can also lead to fissuring (cracking) of the lips, dryness, tongue ulcers, gum infections and tooth decay. Therefore, if you start to experience these symptoms, get them checked at once.

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