The tongue is a muscular organ with sensory function that enables taste
and plays a major role in phonation, the ability to speak, and the early stages of food intake. A coated tongue is a tongue lined with a whitish coating. It can be a sign of a digestive disorder but also of poor oral hygiene
. Brushing the tongue has no effect on the deposit. Suspicions of some abdominal conditions such as appendicitis
, may be strengthened when coated tongue appears, but this sign has no certain value.