Mouth ulcers are generally not recommended to take cephalosporin, you can choose the surface to promote healing drugs. Generally mouth ulcers, small areas of 7-10 days to be able to heal themselves, large ulcers can be treated with healing-promoting drugs, commonly used are recombinant human epidermal growth factor gel or topical solution. In addition, you can also choose tretinoin ointment, and you can also use compound cortical dispersion, tin-like dispersion or nourishing Yin and muscle, watermelon cream spray, etc. Meanwhile, it is recommended to maintain oral hygiene to avoid recurrent mouth ulcers. Commonly used mouthwashes, such as ezacridine solution, or furacilin solution can be chosen. It is also recommended to use 1% procaine or 2% lidocaine as an option for mouth ulcers if the pain is severe. There is no need to take cephalosporin because cephalosporin is an antibiotic that is generally not very useful for mouth ulcers. If the mouth ulcer is accompanied by an infectious disease, you can take oral cephalosporin anti-infective treatment as appropriate.