I know that in general, massage is okay. However...every year at work we get a week of being spoiled which includes a 15 minute massage. I missed it last year as I was on sick leave but it turns out...
Stuff that! Do it! Massage your lymph’s beforehand and you will be fine. My Oncologist gave me a written permission slip because the centre I went to wouldn’t do the spa massage treatment without one. I felt like a school kid needing a permission note.