Hello! I had tissue expanders placed post mastectomy in December. The left side has been filled and is doing fine. The right side has some CCs in it, but will begin filling in June. The right side does not cause any pain, but it does move around in the breast pocket. Is this normal? This side was the cancer free side. It was left empty to allow room for radiation on the left side. There is a lot of breast tissue surrounding the expander that would allow movement.