Early symptoms of oral cancer are hard nodules in the mucosa, ulcerated surfaces, and white spots. Oral cancer refers to malignant tumors occurring in buccal mucosa, hard palate, upper and lower gingiva, tongue and other parts. Its etiology is not yet clear, which may be induced by smoking, drinking alcohol, chewing betel nut, viral infection, heredity and other factors. Early symptoms of oral cancer are similar to general oral mucous membrane lesions, in the early stage, hard nodules may appear in the mucous membrane, and then the epidermis may be eroded and ulcerated, with white or red spots on the surface, accompanied by irritating pain. Once patients are suspected to have symptoms of oral cancer, they should go to regular hospitals and undergo relevant examinations. If oral cancer is diagnosed, patients should actively cooperate with doctors to take relevant treatment measures so as to prolong the survival time and improve the quality of life. In daily life, ensure sufficient rest and do not overwork.