Hi @bevvzy as Melclarity says, it's really just about sensible precaution. If avoidable, lymphoma is something we could do without. I do find my left arm tires and aches much more than my right, but if that's due to the full node sweep (left) versus just the sentinel node (right), or due to the radio on the left, I don't know. But I try to take care of it just in case.
@Myjourney the numbness should lessen, though I have been told it may never go completely. - 8 month today since surgery the numbness is barely noticeable on the left side :)