There are several possibilities for foot blisters: 1, contact dermatitis: mainly due to the application of ointment and caused by the clear boundaries of edematous erythema, there are small or relatively large blisters, accompanied by itching and pain, in the treatment of anti-allergic treatment, oral Orlistatine hydrochloride tablets 1 in the morning and 1 in the evening, for the large blisters need to be pumped herpes treatment, for small blisters can be applied to Denide cream twice a day for treatment. 2. papular urticaria: small blisters can appear on the basis of the wind or erythema, at this time you can carry out herpes extraction treatment, you can also apply mometasone furoate cream once a day for treatment, if the itching is intense you can also take chlorpheniramine maleate tablets orally to enhance the effect of anti-itch treatment.