breast change after radiotherapy

Hi

I saw the breast care nurse today who said it looked like oedema of the breast and had already spoken to the radio oncologist and she printed off some info for me. I saw the physio (she's amazing!) just before Xmas but she's now left which is so annoying! I have been given the name of another woman who specialises in all things breast cancer lymph related. She also had breast cancer a few years ago so knows about it from both sides of the track! Will call for an appointment - cording still not better and need some of this boob fluid draining! What's the difference between oedema in the breast and lymphoedema of the breast? 

Thanks