Allergy blistering and itching can usually be treated by general treatment, local medication and systemic medication. 1. General treatment: When allergy blisters and itching occur, patients usually need to stay away from the allergic environment or stop eating allergic foods to prevent allergic symptoms from worsening. Moreover, patients should not scratch the itchy area excessively, so as not to cause local skin breakage and secondary bacterial infection. 2. Local medication: for allergy blisters itch, if the lesions are small, and not accompanied by other adverse symptoms of the patient, can be treated with local medication, you can use compound camphor cream and other antipruritic agent for treatment, or external glucocorticosteroid ointment, such as mometasone furoate cream and so on. 3. Systemic medication: If the lesions after the allergy are large, or the effect of external drugs is not good, you can be treated with systemic medication. It can be combined with oral antihistamine drugs such as loratadine, cetirizine and other drugs. If the patient is allergic to blisters and itching, it is recommended to go to the hospital in time, and actively cooperate with the doctor for treatment. The above drugs should be used according to the doctor’s instructions.