Long-term affects of taking 1 10mg Prednisone pill daily?

I suffer from chronic hives (two years now) and doctors have tried every antihistamine in the book, with no results. I am always itchy, and breaking out with patches of hives all over my body. It's MISERABLE. They have tried Prednisone short term and it works miraculously, but they are hesitant to put me on it long term. As a female, what are the long-term affects? Do the pro's outweigh the cons?