Gum cancer ranks first among oral and maxillofacial carcinomas, and is mostly a highly differentiated squamous cell carcinoma. Clinical manifestations and diagnosis: 1.Gum ulcers that do not heal for a long time and grow faster, or wounds that do not heal for a long time after tooth extraction and lumps that are prominent. 2.Loose and painful teeth at the lesion site. 3.Difficulty in opening the mouth when it develops backward to the posterior molar area and pharynx; numbness of the lower lip when it affects the inferior alveolar nerve. 4.Enlarged lymph nodes in the neck. 5.X-ray examination shows that the jaw bone is “The diagnosis is confirmed by pathological histological examination. Treatment measures: A comprehensive treatment mainly based on surgery should be performed. 1. Surgery: It is the most effective radical treatment method at present and can achieve good results for any part of oral and maxillofacial cancer. Jaw bone reconstruction can be carried out at the same time or at a later stage, and then denture repair can be carried out later to restore the chewing function. 2.Radiotherapy: It can be applied as a comprehensive treatment method before and after surgery, which can effectively improve the 5-year survival rate after surgery. At present, radioactive particle implantation with less side effects and complications can be applied intraoperatively or at a later stage. 3.Chemotherapy: Although it has certain effect on gum cancer, it is not effective alone. It should be used as one of the comprehensive treatment methods before and after surgery to improve the therapeutic effect, and can also be used as a palliative treatment for advanced cancer, which has certain effect on reducing cancer pain and prolonging the survival period. 4.Immunotherapy: as one of the comprehensive treatment means has been proved to effectively improve the treatment effect, and can be used before and after the surgery. How to prevent: The prevention of oral cancer lies in reducing foreign stimulating factors, actively treating precancerous lesions, and improving the body’s ability to resist diseases. Early detection and early treatment should be emphasized, and comprehensive treatment should be given priority to, based on surgical treatment, together with other therapeutic means for comprehensive and systematic treatment, which is expected to receive good treatment effect.