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Some of the possible common medical causes of Tongue mass may include: 1  Tongue malignancy. 2  Abscess. 3  Ateriovenous malformation.  Trauma to the 1  tongue. Antibiotic resistant staphylococcus infections. 2  Actinomycosis. Hemangioma.  Leukoplakia.
Some other causes of coated white tongue are accumulation of keratin or dead skin cells on the surface of tongue, tobacco abuse, consumption of extremely hot foods or beverages etc. Abnormal buildup of keratin is generally caused by dehydration as it tends to dry out saliva, thereby making the tongue dry.