urticaria
"I have chronic idiopathic urticaria and like a lot of other people on this thread I tried Benadryl,creams, oatmeal baths, changing soaps... didn't help. I tried Allegra for the first time last night and had almost instant relief. I still have some hives but the itching is far less intense and the hive are less red. I am glad I came across some of these reviews!!"