Salt, as a flavoring, has no therapeutic effect on mouth ulcers. Mouth ulcers should receive regular treatment. The treatment of mouth ulcers is generally localized medication, and the commonly used drugs are anti-inflammatory drugs, including film, gargle and powder, as follows. 1. Membrane agent class: such as compound gentamicin membrane, membrane agent can form a soluble gel adhering to the surface of oral mucosa after soaking in saliva. 2. Gargles: such as 0.1% potassium permanganate solution, 3% compound borax solution, 0.02% furacilin solution, chlorhexidine solution, povidone-iodine solution and so on. 3. Dispersions: such as compound cortical dispersions, watermelon cream and other dispersions, locally applied to the lesion area. All of the above medications should be used under the guidance of a doctor, and it is recommended to go to the hospital in time to receive professional treatment as soon as possible.