Itchy hands and feet

Flipping heck, I have been doing quite well and on Thursday I am due to have round 5 of folfirinox......but...…...yesterday my hands and fingers started to itch and today my feet are also itchy, of course I am seeing this as a bad sign. I am seeing my oncologist tomorrow so will speak to him about it but I must say I am a bit worried. I have no jaundice and very little pain, I remain active, have put on weight and at my last oncologist appointment (2 weeks ago) my tumour markers had again fallen. Does anyone have any ideas.

Theresa