inflammation of mouth and lips. See Candida, Herpes Simplex i, Stomatitis Aphthous, Pyorrhea, and Gingivitis programs.MouthEncyclopedia Entry for Stomatitis :Stomatitis. Inflammation of mouth and lips. See Candida, Herpes Simplex i, Stomatitis Aphthous, Pyorrhea, and Gingivitis sets.Information from Marcello Allegretti.