My oncologist referred me to a physical therapist who specializes in lymphedema issues. The PT massaged me and taught me how to do it to myself. Maybe your daughter's onc can refer her to someone who specializes in lymphedema issues or your daughter can find someone on her own. I think it's important to find someone who knows what they're doing.
Just FYI, I also wear a compression sleeve and gauntlet when I fly. I have blood pressure taken and blood draws and IVs done on the opposite arm from the affected side as well.
Good luck to your daughter. I hope she finds someone who can help.
