Survivor since 2011
It sounds like lymphedema which the physical therapist should absolutely be able to help with a sleeve, massages, other techniques, etc. I am 6 months post mastectomy (6 month follow up tomorrow!) and I have more tenderness now than I did right after. Weird. After radiation I had a lot of tissue tightening and the skin, especially in my armpit areas, is very sore/tender. I think it is normal, unfortunately. I figure the discomfort is a small price to pay for being healthy! Good luck with the PT!