Oral ulcer symptoms fall into three categories

(1) Oral disease caused by: If Shaffa RAU, herpetic stomatitis, and hand-foot-mouth disease, pemphigus and pemphigoid secondary ulcer,As long as the timely use of this type of ulcer antibacterial, antiviral, anti-allergic and other therapeutic measures, or Differential Treatment of Chinese medicine are not normally occur malignant transformation. Special attention should be given to the yes, right is a precancerous lesion of mucosa disease can not be taken lightly. If the white, red grouper, lichen planus, and so on the basis of damage, a prolonged ulcer, should arouse a high degree of vigilance. (2) of traumatic ulcers: This is a class with local incentives directly related ulcers. The tooth fracture left residual crown, deposited on the surface of the stone teeth, missing teeth or longer length wrong position, the bad habit of biting cheek teeth formed after the wear and the sharp edge of the rough work may cause dentures and so traumatic ulcers . Such ulcers, as long as the early detection of pathogenic factors, such as timely removal of residual crown and root, grinding to sharp edge, scaling dental calculi, correct bite buccal habits. Re-Insert teeth, and other measures, will soon healing. However, if found late, ineffective measures, trauma oral ulcer may be cancerous. (3) tumor caused by the "vicious ulcer": This type of malignant ulcers local infiltration is the result of the development of the ulcer appeared before the cancer may have a systemic manifestations.