You are probably suffering from what Dermatologist call urticaria. Common causes are food allergy infection or drugs. Although, in most cases cause remains unknown in spite of a thorough search. It can be treated so that you do not get any new hives and the treatment should be prolonged until it resolves which usually takes 3 to 6 months. You probably need to increase the dose of Allegra and also add another antihistamine at night. Please consult me in private for further details or visit a nearby Dermatologist
Answered2017-04-10 13:55:05
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