Melkersson Rosenthal Syndrome (SMR) is a rare orofacial granulomatosis of controversial etiology. It combines recurrent facial palsy, upper labial edema and a plicated tongue. Through a case of SMR we recall the clinical and therapeutic peculiarities of this pathology. 36-year-old patient, who presented in our consultation for labial and gingival edema of progressive worsening, evolving by outbreaks for five years. The interrogation reveals in the antecedents the notion of transient facial paralysis. Examination shows prominent lip edema in the upper lip, edema and superior gingival hypertrophy and a plicate tongue. The diagnosis of SMR was retained. Patient was put on prolonged corticosteroid treatment in degressive dose, which led to a clear clinical improvement with disappearance of the edema not recidivism after a decline of nine months. The SMR is an orofacial granulomatosis manifested by a symptomatic triad: recurrent paralysis or facial paresis, macrochelitis and a plicate tongue. This triad is rarely complete, and some minor signs can be observed. The diagnosis is mostly clinical and confirmed by histology. But a non-contributory histological analysis should not reject the diagnosis of SMR when the clinical symptomatology is obvious. Systemic corticosteroids are the most recommended treatment. It improves the quality of life and avoids or space recurrences. The prognosis remains good