@Ward Very simply it's scarring that results from the removal of lymph nodes. Also called axillary web syndrome. It's a tight cord or rope, like a thick guitar string that runs from the armpit or BC surgery scar down your arm that limits movement. Not everyone gets it. See
http://beacon.bcna.org.au/2018/04/lymphoedema-need-know/For me, along with lymphedema cording is an ongoing issue that gets better with stretches, compression sleeves and massage, but it is made worse when I get an infection in my hand as the surrounding tissue and lymphs get swollen again.
