The full name of oral melanoma is oral malignant melanoma, which often occurs in the oral mucosa and is one of the most malignant tumors of the oral mucosa. The cause of malignant melanoma is not clear at present, but it is certain that it has some relationship with melanocytes, some relationship with light, and some relationship with the cancer of normal pigmented nevi in human body. The treatment of malignant melanoma is mainly surgical treatment, and the scope of excision should be expanded as much as possible, and some cryotherapy methods can be considered for the treatment of melanoma. For malignant melanoma, patients are advised to visit a larger dental institution.