White transparent blisters inside the mouth may be caused by oral ulcers, mucous gland cysts or herpes on the lips and mouth, which can be treated with the use of medication or surgery depending on the situation. 1. Mouth ulcers: caused by ulcerative damage to the oral mucosa, white blisters in the mouth may be mucous blisters. Patients can take cediriodine tablets and quinclorac tablets to help anti-inflammatory and sterilization in the mouth. 2. Mucous gland cysts: Mucous gland cysts are clear blisters on the mucous membrane inside the lips caused by bad lip-biting habits. Surgery can be chosen to remove the cyst completely and at the same time, remove the surrounding suspicious glandular vesicles, which can achieve the purpose of eradicating the cyst. 3. Oral and Lip Herpes: Usually caused by herpes virus infection, it will cause white transparent blisters inside the mouth. Antiviral treatment is needed, and drugs such as acyclovir and valacyclovir can be chosen, or acyclovir ointment can be applied locally, which can be effective for treatment. If the above symptoms occur, it is recommended to go to the hospital in a timely manner, as soon as possible to carry out regular treatment, should be under the guidance of the doctor to use medication, do not blindly use their own medication.