Hi. I did in pt a similar thing for desenitization and it was called fluidtherapy. Your put your legs in this heated sand that blows on your legs at different temps and speeds. Your suppose to build up in temp and speed which shows your body can tolerate more. I guess at first its uncomfortable and for me it was but gradually it helps you tolerate more in general life. I also had the sock issue where I couldn't wear them. I tried all kinds. Now I'm able but I did go through extra pain getting used to them. Now I wear them most of the time cause I know if I don't my body will have to readjust to them.As for how your suppose to react mentally while doing the therapy and iI may be wrong but for myself I tried to go to a "happy" place and relax so my muscles would relax as much as they can. It is hard when the pain gets intense but I tried to practice my breathing and distract my mind. Good luck and sorry I don't have more info.