Hello @sharonandkathy i am sorry you are going through this. If this is a very recent lumpectomy, swelling and fluid could be causing this. If it has been a long time, then maybe not.
In my case it is scar tissue that causes the deformity, I could have gone back to the surgeon after all of the treatments were done, but I just couldn’t bring myself to do one more thing that year. I had multiple surgeries and chemo and then radiation. My radiation oncologist said it was exacerbated by the radiation.
Have you asked your doctor about this? How long has it been since your lumpectomy?