@SallyS Hi Sally. I had a lumpectomy Dec last year. The surgeon took tissue from under my breast to fill in the gap & did a great job. This area below the cut, however, did develop quite a lump which i did ring the surgeon's office about & spoke to a Breast care nurse. She told me that it was a build up of fluid & scar tissue & that it would eventually loosen up & any fluid would be absorbed back into the body gradually. As my area was quite hard & sore, she told me to put a small icepack on it which sat in my bra. 20 mins on & 20 mins off & to also gently massage the area with Vit E cream. I still have a bit of a lump now that is normal but it continues to soften as I massage it daily. That was my story but as @kmakm said, we are not doctors so it is best to speak to someone yourself as reassurance. I find the Breastcare nurses have WONDERFUL advice & they are usually easier to speak to than doctors. I have rung the Breastcare nurses at the hospital I had surgery in, the nurses who works at my surgeon's office & now I have a nurse of my own who I ask anything to & she always has the answers or finds them out for me. We have these wonderful resources available to us so please ring one & use their services & the peace of mind you will get from talking to them is invaluable. I hope you get a good outcome & let us know how you get on. hugs xx