Skin under boob has changed

I think its normal as that's what happened to me. I got a large red welt and I lost all my skin on the crease between boob and chest where the bra line sits. Was very painful. Used lots of sudocrem. My boob is quite hard and skin is different. I'm told it will improve but takes time. If you are seeing consultant,  no harm in getting them to check it over for peace of mind for you x

I agree, my radiot finished in August and my boob is constantly changing shape and colour.  I too have raised skin and it often feels heavy.