What is the cause of dryness of mouth and tongue at night?

Dry Mouth

Q . What is the cause of dryness of mouth and tongue at night?

A. The cause may be sleeping with the mouth open or a feverish condition. Mouth breathing is almost always due to nasal obstruction. If due to fever at night there is perhaps ground for suspicion that some chronic disease, as tu­berculosis of the lungs, may be getting a foot­ hold.

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