An evaluation of glossitis begins with a history and physical examination.
Physical findings in someone with glossitis may include:
- Tongue swelling:
- Hairy tongue
- Grooved tongue
- Tongue lesions:
- Tongue ulcer
- White patches on the tongue
The diagnosis of glossitis is made during physical exam. The underlying cause of glossitis is usually confirmed through testing
Tests that may be used to evaluate glossitis include:
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- Assimakopoulos D, Patrikakos G, Fotika C, Elisaf M. Benign migratory glossitis or geographic tongue: an enigmatic oral lesion. Am J Med. 2002 Dec 15;113(9):751-5. 
- Bohmer T, Mowe M. The association between atrophic glossitis and protein-calorie malnutrition in old age. Age Ageing. 2000 Jan;29(1):47-50. 
- Byrd JA, Bruce AJ, Rogers RS 3rd. Glossitis and other tongue disorders. Dermatol Clin. 2003 Jan;21(1):123-34.