Hi Athens,
I too, was advised by my oncologist, to have the PICC line, but after I researched and spoke with a few oncologists nurses, who said that there is more chance of infection, and would have to wear a sleeve whilst showering and swimming. I refused. I have had 3 FEC treatments by intravenously, and all ok. I think the nurse you spoke to, probably meant cording, this as happen to me where the vein tightens up my arm, but with moisturing and lots of massaging it does ease up, and I'm told that after treatment it will get better.
It's a personal choice, listen to yourself, and I'm sure you will make the right decision.
I'm in Majorca at the moment, doing all normal activities, I did before been diagnosed, and choosing not to have the PICC line, I realise now, I made the right decision. Take care xxxx