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Patient: Female, 70-year-old Final Diagnosis: Chemical burn in the oral cavity Symptoms: Heightened salivation * intense burning sensation * oral edema Clinical Procedure: -- Specialty: Dentistry Objective: Rare disease Background: Chemical burns in the oral cavity, although rare, cause more severe tissue damage than thermal burns, continuing tissue destruction even after removing the causative substance. Prompt identification of the substance, exposure extent, time from injury to treatment, and the injured area are imperative for effective management. This report details severe oral burns in an elderly woman from accidental NaOH ingestion. Case Report: A 70-year-old female patient was presented to our hospital approximately 15 h after inadvertent consumption of approximately 20 ml of NaOH (sodium hydroxide) solution. This incident led to oral discomfort and restricted mouth opening. The ingested solution, erroneously assumed to be a beverage, was later identified as a potent alkaline substance typically employed in grease removal. Initial manifestations included intense burning sensation, oral edema, and heightened salivation, which exacerbated on the following day, adversely impacting her alimentation and verbal communication. Clinical examination disclosed extensive damage to the oral mucosa. The diagnosis encompassed a chemical burn in the oral cavity coupled with chronic gastritis. The treatment regimen comprised dietary limitations, administration of famotidine for gastric acid suppression, intravenous hydration, nutritional support, oral care with Kangfuxin liquid, and nebulization therapy. Six months after therapy, she exhibited complete recovery, with the absence of discomfort and restored normal oral functions. Conclusions: Timely and targeted treatment strategies, particularly nebulization medication and Kangfuxin liquid, are effective in managing chemical burns in the oral cavity, promoting wound healing, and preventing complications. [ABSTRACT FROM AUTHOR]