The immediate cause of herpes on the lips is due to infection with the herpes virus. Herpes on the lips is commonly associated with herpes simplex virus infection, and herpes on the lips can also occur in some cases of facial shingles. Herpes on the lips, commonly known as herpes simplex, is due to infection with the herpes simplex virus type 1, and the infection may be spread through kissing, and other close life contact. It can appear in clusters of erythema, blisters and other manifestations on or around the lips, usually accompanied by localized pain and burning sensation. In addition, herpes zoster on the face can also appear as localized herpes when it involves the lips. It is caused by varicella zoster virus infection, but usually the lesions are distributed in strips along the side of the face. Lip blisters can also be caused by other diseases, the specific situation needs to be analyzed in conjunction with the clinical.