For the causes of clear blisters on the lips, specifically as follows: 1, herpes simplex: this is a viral skin disease caused by herpes simplex virus type 1, generally before the onset of the history of upper respiratory tract infections, mental stress, poor rest, fatigue, staying up late, is the appearance of clear blisters around the lips and the corners of the mouth, in clusters, and accompanied by erythema, stinging sensation. This time you can use topical mupirocin ointment, if the stinging sensation is obvious, you can also take oral ganciclovir dispersible tablets. 2, scalding blisters: due to overly hot food caused by blisters on the lips, when the blisters are relatively large and not broken, you can use sterile syringes to draw blisters after sterile disinfection with iodophor, and then use compound cypress lotion for cold wet compresses, mixed with topical comfrey oil and recombinant human epidermal Growth factor gel, and avoid eating excessively hot food during the treatment period. Therefore, for clear blisters on the lips, patients are recommended to go to a regular hospital for treatment under the guidance of a dermatologist. During the treatment period, avoid spicy and stimulating food, alcohol and rest.