I had "donut" lumpectomy and lymph node removal around 15 months ago followed by 5 rounds of radiotherapy. Today, after all this time, I am happy to say that I have had no pain or discomfort at all. It has been dwindling over the past weeks, but I did think I might have pain of some kind forever as it continued for so long. Hope this helps others who may be in pain after treatment. It will get better.
