Oral white spots clinically known as oral mucosal leukoplakia, this disease is not serious in most cases, individual has the possibility of cancer, so there is a certain degree of seriousness, need to be treated and prevented in time. Oral mucosal leukoplakia is a kind of white patch or plaque that occurs on the gums, buccal mucosa occlusal line, tongue, etc. This kind of plaque can not be easily wiped off, and it can not be diagnosed as other diseases through histopathology and clinical manifestations. The disease does not usually cause permanent damage or complications and has a good prognosis after treatment, so most are not serious. However, there are some patients who have the possibility of cancer, even if the white spots are eliminated, the risk of developing oral cancer is still higher than normal, and for these patients, the disease has a certain degree of seriousness. At present, there is no complete cure for oral mucosal leukoplakia. In order to prevent cancer and relieve the pain, patients should not only actively cooperate with the doctor’s guidance, but also pay close attention to the changes of the lesion area, conduct regular checkups, and try to avoid eating stimulating food and quit smoking and drinking.