for me, when my heart rate is up (from walking, being upset, etc) I get swelling in my arms, neck and hands. Even being overheated (in car, standing outside, too much hot tub, etc.) causes some swelling and discomfort.

So I try to do my walking - the only exercise I can tolerate besides stretching - when my body is cold ie: not warmed up.

Cardio? Weight training?? These are things to be avoided if they give you pain or swelling!

The hot tub seems to increase blood flow, dialating my vessles and allowing my meds to be absorbed more deeply.

Blood flow: GOOD.
Weight training: BAD.

...at least for me.