Hi, I was getting really worried as, following rads, I had developed cording which was preventing me from using my arm properly. Had a little google and found cording often resolves spontaneously in 2-3 months. That was too long for me so I decided to do what I could to make it go. So I stretched my arm as far as it would go several times a day, gently massaged the area every day, and used therapeutic magnets at the armpit (about 3 x 1 hour). And it’s gone now!!! It’s so nice to be able to reach for things.
This isn’t meant to sound smug. Just thought it might help someone. 
x