A visual inspection of the tongue has also been shown to aid in diagnosing diabetes. Diabetic tongue refers to the comparable physical properties of the tongue's appearance in diabetic patients, such as color, shape, fur color and thickness, and saliva flow. A positive diagnosis can also be attributed to salivary gland dysfunction. Learn more in our blog article, "Expect More From Your Spit: The Slobbery Link Between Your Saliva and Diabetes."