Early typical symptoms of oral mucosa cancer are as follows: 1. Color change of oral mucosa, including white, brown and black, are signs of the beginning of the disease, which should be paid attention to. In particular, the oral mucosa becomes rough, thickened and hard knotted, and the appearance of oral white spots and red spots at this time indicates that lesions have occurred; 2. Oral ulcers can occur in most people, which are mostly cyclical and can heal by themselves. Generally, it does not exceed two weeks. If it does not heal for several months, it needs to be alerted to oral cancer; 3. The appearance of lumps on lips or in the mouth needs to be considered as early symptoms of oral cancer. Early stage of oral cancer only shows small local lumps and little pain, especially the local friction feeling. If the tumor breaks down, the pain is more obvious.