I developed PN during Taxol (can't remember exactly when) and the onc monitored it very closely. I think by the time I finished it was going up my legs and was in my fingers. I do recall that one of his questions was whether I could manage my earrings. It's important to remember that the amount of treatments suggested is more about what most bodies can tolerate not about the amount needed for the cancer - they don't really know exactly what that is. That's why they give you a lower target to try to reach with every treatment after that being a bonus. For me, 2 years after treatment, I still have PN in one foot. Mostly it's not a big deal but it can impact on balance so I'm very grateful that it's not worse. Funnily enough my nails were fine during treatment - 18 months later my big toe nails have started to lift.