Blisters in the mouth are considered to be as follows: First, herpes stomatitis caused by herpes simplex type 1 virus infection, which can appear as clustered distribution of blisters, rupture, bright red vesicles and other manifestations, at this time you need to take oral acyclovir tablets or famciclovir tablets for antiviral treatment, usually in the treatment of herpes in the 7-10 days can be cured; Second, the common type of pemphigus, the disease is due to the formation of blisters in the skin mucous membrane between the epidermal epidermal cells appearing loose. This disease is due to the epidermal epidermal cells in the mucous membrane of the skin between the spiny cells appeared to form blisters, in the clinical treatment need to apply glucocorticoid drugs for intramuscular injection, you can choose the compound betamethasone injection, can also be taken orally methylprednisolone tablets for treatment. Third, mucous gland cysts: the cause of mucous gland cysts is mainly due to bite wounds or repeated extrusion of mucus retention, saliva can not be discharged to form translucent vesicles, which require surgical excision.