Hi Cathy, I had a single mastectomy 8 yrs ago. I found the tightness improved abit after 6wks and I could be fitted with a prosthesis.Now here’s the weird thing- when I have pressure against my chest from the prosthesis,it feels almost normal.But without it, my chest feels tight like it has duck tape strapped around it. I suspect I have adhesions and having had radiation to that area 15trs ago wouldn’t help either.It really does take a long time for it all to settle down and even then,you’ll probably find you are left with some numbness and possibly some tightness but we are all different.