Ключевые слова: accident, acute, adult, aphthous ulcer, aphthous ulcers, buccal, canker sore, canker sores, cavity, close up, closeup, common, disease, erythematous, hygiene, inflammatory, injury, inner, irritate, irritation, laceration, lip, lips, lower, macro, mouth, multiple, open, oral, painful, patient, problem, small, sore, stress, teeth, tooth, trauma, traumatic, ulcer, ulcers, wound,