Hi . Steroids are commonly used in cancer treatment and they usually reduce inflammation. So that might be why your breathing is improving. Many people with autoimmune arthritis experience less pain during chemo for that reasons. Have you asked your doctor about it? What a wonderful side effect, regardless. You deserve some relief. How much more cancer treatment do you have remaining? Are you a candidate for stem cell transplant? Thinking of you and sending lots of healing vibes your way. - Lori (Team Member)