Dry mouth can have causes that aren't due to underlying disease. Examples include not drinking enough fluids, sleeping with mouth open, dry hot weather, eating dry foods, or medication side effects.
Self-treatment
Frequently sipping water or other sugar-free fluids, chewing sugar-free gum, and using over-the-counter artificial saliva products may help keep the mouth moist. A room humidifier may also help.
Seeking medical care
See a doctor immediately if you
Suddenly develop dry mouth
Also urinate frequently or have infections
Make an appointment to see a doctor if you
Experience constant dry mouth
Have trouble chewing, speaking, or swallowing
Find it difficult to wear dentures
Develop excessive tooth decay