The blisters on the inside of the lips are generally considered in two ways, one is because the food is too rough or hard and irritating food, resulting in skin abrasion and irritation blisters on the inside of the lips, similar to the blisters on the hands and feet because of the wear and tear of labor, and the second is because of certain herpetic diseases resulting in viral blisters. If you recently eat more nuts, coarse grains and fried barbecue and other spicy food, this kind of blisters do not need to be treated, generally a few days can be healed by itself, if more serious can be treated with external watermelon cream spray, if the effect is not good, please consult the stomatology department in a timely manner. If you do not have the above bad eating habits, the blisters are red, swollen and stinging with edema of the surrounding tissues, similar symptoms are mostly viral blisters, similar situations should be promptly consulted, more need to be treated with topical drugs combined with oral medication, drugs should not be purchased at will, should be taken under the guidance of a dentist to avoid the spread of disease aggravation. Whatever the cause of the blisters on the inside of the lips should be given sufficient attention, first of all, the diet should be light and easy to digest, avoid hard food, such as the diagnosis of viral blisters, should be in accordance with the course of medication, after the disappearance of symptoms and then 2-3 days for consolidation.