Sudden blistering of the lips is likely to be caused by the following reasons: First, the lips have been burned or frostbite. Second, the patient eats allergic food or medicine, which is also likely to cause sudden blistering of the lips. Third, the patient has a viral infection, the herpes virus is often in the postauricular ganglion of adults, once the patient’s resistance is low, the herpes viral infection will occur. Fourth, chronic labyrinthitis or solar labyrinthitis, most of this disease is chronic and will gradually appear blistering, must be promptly to the stomatology department for consultation and treatment. After the blistering of the lips, you can use the wet compress method to minimize the liquid in the bubble, which can reduce the volume of the bubble until the bubble crusts and then gradually get better.