The term Necrotizing Ulcerative Stomatitis (NUS) is derived from the Greek word stoma, meaning "mouth", and the suffix –itis, meaning "inflammation." Hence, it is an inflammatory disease of the oral cavity characterized by the destruction of epithelium, connective tissue and papillae leading to extensive bone loss. NUS usually has a sudden onset, and progresses from the mildest form on the spectrum, necrotizing ulcerative gingivitis (NUG), to the successively more severe condition of necrotizing ulcerative periodontitis (NUP), leading to necrotizing ulcerative stomatitis and finally cancrum oris (noma), which is frequently fatal. The etiology is somewhat unclear, but it may involve a complex of fusobacterium nucleatum along with spirochetes, borrelia or treponema. Well recognised host factors known to predispose to NUS include HIV infection, diabetes mellitus, immunosuppressant medications, malnutrition, psychological and physical stress, smoking and genetic prdisposition. NUS is frequently present, in combination with one of the other factors. The clinical characteristics of NUS include ulcerated and necrotic marginal and papillary gingiva covered by a yellowish-white or grayish slough or "pseudo membrane", blunting and cratering of papillae, spontaneous bleeding or bleeding on probing, pain and fetid breath. With this being said, the intense oral pain accompanying NUS is what usually causes the patient to seek dental treatment. We hereby present a case of an emaciated 70 year old diabetic male who was diagnosed with necrotizing ulcerative stomatitis. Key words: Necrotising Ulcerative Gingivitis; Periodontitis; Stomatitis