Timing: There are lots of reasons for dry mouth as well as dry eyes. Medications. Diseases and disorders. The late timing may be due to activity throughout the day and the reduction of fluids come to a head, so more inflammation and parchness. See your md.
Answered 2/25/2014
4.4k views
It's natural: It's a natural physiologic process of reducing water loss while sleeping when the body can't be replenished. It's conservation of a natural resource.
Answered 3/12/2014
4.4k views
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