Fortunately I do not (touches wood quickly) suffer from this condition but I spoke with a friend today who knows someone etc. Anyway, this someone has lymphodoema and uses a small trampoline once a day for 2 mins jumping up and down with her arms reaching up!! Apparently her swelling reduces by 2cm.
Sounds a bit unorthodox but might be worth a try, once medical experts have been consulted of course. Don’t want anyone doing themselves a mischief!
I don’t need any replies, just thought someone might like to try it and report back!