What do you tell your Pedicurist before treatment?

I have lived in Baja Mexico California for the past 12 years. I have used Nubia, pedicurist, for 10 of those years. I try to tell her about my condition but don't seem to be getting through to her. My Spanish is terrible. My guestions are do I use cold or hot water to hydrate the soles of my feet, they always feel cold, and is it alright for her to use a sandfile for the calluses on the heels of my feet? Should I use some kind of pain releaving creame afterward my pedicure? I have her massage into my feet and legs with Coconut oil when she is finished. I hope you don't think ths is a silly question but I feel proper care of my feet is important for my health.