Hi Inkpetal, I really hope you are able to get some answers and some support for what must be a really frustrating situation, especially while you are dealing with radiotherapy. I can only add to the advice the other ladies have suggested in terms of finding a lymphoedema specialist - I was referred to mine through the radiation clinic I attended and she has been a godsend over the past couple of years. I also wondered if the swelling was edema (circulatory system issue) rather than lymphoedema, but hopefully your radiation oncologist can confirm what the problem is so you can get the appropriate treatment. Hugs and best wishes, Jane xx