The oral cavity is easy to blister may be unbalanced with the bite of the teeth, or the emergence of oral mucosa blister disease, specific need to go to the hospital to do oral examination to determine. 1. Occlusal imbalance: the oral blisters may be easy to cover the teeth overlay too small, up and down chewing teeth easy to bite the buccal mucosa caused by traumatic blisters, may also be too sharp caused by the tip of the teeth, under normal circumstances need to be adjusted to deal with jaw. 2. herpetic disease: when the body autoimmune disease, oral mucosa can appear blisters, can be seen in pemphigus or pemphigus-like, the oral cavity extensive occurrence of blisters of varying sizes, easy to erosion and ulceration, the treatment of the general use of adrenocorticotropic hormone and cyclosporine and other immunosuppressant drugs for treatment. Oral blistering is recommended to timely medical treatment, the use of drugs need to follow the doctor’s instructions.