Table 5. Evolution of burning mouth syndrome (BMS) diagnostic criteria.

1988	ICHD 1		Absent
1994	IASP	Glossodynia and sore mouth	• Definition: Burning mouth syndrome (BMS) is a burning pain in the tongue or other oral mucous membrane persisting for at least four months and associated with normal oral mucosa and normal laboratory findings. • Diagnostic criteria: burning sensation in the tongue or other parts of the oral mucosa, usually bilateral and associated with dysgeusia, dry mouth and denture intolerance
2004	ICHD 2	BMS	• A. Pain in the mouth present daily and persisting for most of the day. • B. Oral mucosa is of normal appearance. • C. Local and systemic diseases have been excluded.
2013	ICHD 3	BMS	• A. Oral pain fulfilling criteria B and C. • B. Recurring daily for >2 hours per day for >3 months. • C. Pain has both of the following characteristics:     ○ Burning quality.     ○ Felt superficially in the oral mucosa. • D. Oral mucosa is of normal appearance and clinical examination including sensory testing is normal. • E. Not better accounted for by another ICHD-3 diagnosis.

ICHD, International Classification of Headache Disorders; IASP, International Association for the Study of Pain.