IIt is a rare lesion, apparently of traumatic origin, that must not be confused with eosinophilic granuloma which forms parto f histiocytosis “X”. It starts in an acute form, with no apparent explanation, and localizes mainly in the tongue.  It resembles a burn; there is deep infiltration and pain, and sometimes a malodorous crusting. The ulcer , approximately 2 cm in diameter, appears after the removal of the necrosed tissue and is hard in its deep portion.  Histology and spontaneous cure confirm the diagnosis