Oral cancer is one of the common malignant tumors of head and neck, which mainly occurs in middle-aged and old people, especially those who have some bad hobbies, such as long-term betel quid chewing, smoking, and some people with special sexual habits. In the early stage, the main manifestations are long lasting ulcers on the oral mucosa and neoplasm of the oral mucosa, such as cauliflower pattern. The surface of the neoplasm bleeds easily, and the bleeding is not easy to stop. However, with the development of the tumor, the ulcer surface may increase in size or the nodules may keep growing. In this case, you can find a dentist to take a look at it in person in order to make a clear diagnosis and treat it as early as possible.