The blisters inside the mouth may be traumatic blood blisters, small salivary cysts, pemphigus, etc. The main treatments accordingly are puncturing the blood blisters, surgical excision, and medication. 1. Pricking blood blisters: If it is caused by traumatic blood blisters, the main treatment accordingly is to prick blood blisters and reduce the irritating factors. However, this operation should be carried out by a doctor, and patients should not break it by themselves to avoid infection. 2. Surgical excision: if it is caused by minor salivary cysts, the main treatment is surgical excision of minor salivary glands. 3. Pemphigus: If it is caused by pemphigus, systemic or local glucocorticoid treatment, such as prednisolone, etc. should be considered. The medication should be used under the guidance of a doctor. The blisters inside the mouth may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.