The first time I went for my revision the surgeon said that it was definitely due to activity from moving my arms around which caused small tears in the tissue which made the tissue almost “leak” out of the original circular shape made with the stitches. This was only because I was heavily working out after my first surgery I guess before I was fully recovered. But after my 1st revision I didn’t workout at all and the nipples still expanded the same which is why I chose to go with a different surgeon to see if what they do would be different, but once again my nipples are expanding just this time they haven’t expanded as big and it’s more just scar tissue.