Hi @colely
I guess OT is probably what it really was for my cording. I say PT as the umbrella. PT/OT is a big time commitment, but so helpful. Were the shoulder problems caused by the mastectomy? I did have incredible ROM issues initially. I still can't lift my arms all the way up, but good enough for daily living. I had a couple steroid shots in my shoulder for a non-related partially torn rotator cuff years ago. It gave me about 3 months of being totally pain free each time.

I've found that over-using my arm like doing heavy duty housework really causes cording and swelling so I try not to overdo it. Maybe try to use your non-mastectomy side for scrubbing and stuff even if it's not your dominant hand. Learning to use your non-dominant hand for tasks is really good for your brain -- neuroplasticity -- perk!