Most of the causes of oral blisters are two major categories, one is the foreign body wear caused by blisters, blood blisters, broken can form oral ulcers, and the other may be viral infection caused by viral blisters. Mechanical damage caused by blisters in the mouth is mostly self-limiting, generally does not lead to serious problems, can be treated with external watermelon cream spray or ice borax powder, about a week can be completely recovered, such as intraoral blisters around the red swollen area, touching the pain is intense, and even eating difficulties, it is necessary to consider the possibility of viral blisters, general children are mostly hand, foot and mouth or herpes pharyngitis caused by hand, foot and mouth blisters more close to the In children, the vesicles are usually close to the mouth, in pharyngitis the vesicles are mostly in the throat, and in adults they may be herpes simplex or infectious herpes. The specific laboratory tests should also be taken to confirm the diagnosis, the treatment should be based on the cause of antiviral treatment, generally take a combination of Chinese and Western medicine treatment effect, in addition to infectious herpes should avoid deep contact to prevent the transmission to others. The specific medication should be used according to the specialist’s guidance. The first thing you should do is to improve your diet, avoid eating hard, fried and spicy food, stop smoking and drinking, and consult a dental specialist if your symptoms continue to worsen.