@Lispy I don't recall having pain to be honest, I was uncomfortable as time went on and my skin started to burn and blister, but compared to Chemo, it was much easier I found. I'm not sure how it causes cramping, my Surgeon and Oncologist were aware of it though. Its not fixable and Ive learned to live with it. I put it down to the radiation penetrating the upper chest and into the muscles. It certainly hardens everything, I know my breast was so much more harder than the other after radiation. Honestly I wouldnt worry about it, these things are very doable and certainly are able to get through it. You know my Mum had a mastectomy many years ago, and she too complained of back pain, this was to do with her muscle.
I'll tell you something strange though...Ive had NO relief all these years but I have started seeing a Kinesiologist who does spinal analysis network. So bizarre! I cannot explain, she hardly touches my back, but physically I am improving. Alot to be said for alternative therapies helping with symptoms :)