If you're sure you're getting enough water but your mouth is still dry, doctors at UT Southwestern Medical Center at Dallas suggest rinsing your mouth with water. Instead of just gulping the water down, swish it around in your mouth. You can also try rinsing your mouth out regularly with an invigorating mouth wash, but be sure to spit it out instead of swallowing. Other ways to keep your mouth feeling moist include sucking on mints or lemon candy, chewing sugar-free gum, or letting ice cubes slowly melt in your mouth. If you find yourself abnormally thirsty for a long period of time, you're drinking plenty of water and aren't taking any medication that causes dry mouth, talk to your doctor.
Unusual thirstiness can be a symptom of some medical conditions, like diabetes.
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