Regarding urticaria issues. Leave me?

So I have been prescribed allegra for a month. This is my 20th day of course. I developed periodic rashes and they pop up everyday and then disappear the same day. So I even have lip upper and lower rashes too(once in a week I get this) which although disappear on the same day. When these rashes appear the skin over that area becomes hard and stiff(as if my blood is clotted) It's been two months I'm having these problems and I consulted and took many dermatologists opinions. However my 20th day of allegra did not do much better on my skin. I see progress but still these rashes come and go like before. I Heard from few doctors that urticaria is not curable at all. And this made me more anxious. So I have to suffer my whole life time about this? Are these rashes never gonna leave me? I hope I receive answers and opinions soon. Thankyou in advance.