I have had a single sided mastectomy just over a week ago with lymph clearance. There is still swelling but I have a hard lump with a kind of u shaped fold of skin to the side of the armpit. Is this typical swelling post surgery or do I now have an uncomfortable and unsightly lump that will be permanent? It gets in the way of my physio too as I can't properly straiten my arm or rest straight down to my side.