Suggest Treatment For Skin Allergy With Red Patches All Over The Body

iam suffering from skin alergy incomplete body with red patches, when tested it wasfound that i am having food alergy like wheat, milk product etc.i am being treated with alerga tab 180, cetragen and prednesolone but getting temporarily relief. please suggest what i should do and where i can get good skin alergy doctor. i am staying in marathahalli bangalore 37