The white sore mentioned here should be a mouth ulcer, and the most common treatment for mouth ulcers is topical medication. Usually mouth sores can be treated in seven to ten days. The causes of mouth sores are different and are divided into recurrent mouth sores and traumatic mouth sores. The cause of recurrent mouth sores is not very clear, and the exact cause needs to be examined in terms of immune function. For traumatic mouth sores, irritants can be removed, followed by topical sprays and mouthwashes, so that mouth sores can be well treated. Commonly used sprays include stomatitis sprays, throat-opening sword sprays, etc. Commonly used mouthwashes include Chlorhexidine solution, Rehab solution, Tinidazole solution and so on. These are helpful for removing harmful flora in the mouth and maintaining oral hygiene to prevent infection. It is also important to strengthen nutrition and take more vitamins, which can also prevent mouth sores. For mouth sores, the main thing is to prevent local inflammation and prevent infection. If the sore does not heal in more than 2 weeks, it is recommended to go to the hospital for pathological examination to rule out the possibility of cancer. It is important to maintain good oral hygiene and go to the hospital regularly for oral examination. This can prevent some oral diseases.