Diabetic tongue refers to the changes that can be seen in the tongue of people who have diabetes. These changes may include dryness, a covering of yellow/thick fur, or a white coating caused by a fungal infection (oral thrush). Diabetes can lead to these appearances by changing the oral microbiome and decreasing saliva production, making the oral cavity more susceptible to bacterial and fungal infections. Diabetic tongue refers to the changes that can be seen in the tongue of people who have diabetes. These changes may include dryness, a covering of yellow/thick fur, or a white coating caused by a fungal infection (oral thrush). Diabetes can lead to these appearances by changing the oral microbiome and decreasing saliva production, making the oral cavity more susceptible to bacterial and fungal infections.