I've got lymphedema but not from surgery or radiation. I developed it a few months after BC diagnosis. It stunned the oncologist. Since you don't have it now, keep the lymph flowing in your body with daily dry brushing, keep hydrated and move either with rebounding, walking, etc. Another thing which is harder for me is switch between cold and hot showers. At the end of your shower turn on cold water for 30 sec up to 2 min and then switch to hot (warmer water) for the same time and alternate between the 2 for a couple of sessions. I now pump my arm every day and have to wear a compression sleeve and, of course, I've been told there is no cure for it. Good luck and keep things moving!