There are several possibilities for blisters on the face: 1, allergies: most likely papular urticaria. The most likely cause is papular urticaria with severe allergic reactions will appear blisters. 2, Herpes: Herpes simplex generally occurs around the mouth, eyes or nasolabial folds around the limited blisters, usually clustered occurrence, rather than diffuse multiple. 3, Herpes zoster: Herpes zoster is unilateral distribution, that is, on one side of the face. 4, Chickenpox: In addition to blisters on the face, the body will also have many blisters of varying sizes. .