Hi, I have had a swelling in my armpit that was quite painful, however the initial swelling has subsided but I am now left with a very tight cord that runs down the inside of my arm. I can t raise my arm above my head due to the sharp pain that action causes. I have had swellings before, one of which caused reddening of the skin all the way down my arm, exactly where the cord is now. Can you advise? Many thanks.