Dry mouth is a common symptom of diabetes, according to WebMD. The main symptoms of dry mouth are a sticky sensation, frequent thirst, dry lips, bad breath and hoarseness. Dry mouth can be caused by other conditions, and a medical consultation can help determine if it is caused by diabetes.
While dry mouth is a common symptom of diabetes, other symptoms including frequent urination, increased thirst, blurred vision and headaches are also common. Fatigue and blurred vision are also symptoms. Individuals experiencing a combination of these symptoms should be tested for diabetes. Diabetes, if left untreated, can be life threatening, according to WebMD.