from the balls of my feet to the heel, in a line through my arch has became red, kind of swollen, and VERY sensitive to touch, even if its lightly. when walking that line feels tight, almost like there s tape on my feet. i do work standing but only for a few hours 5 at the most. its been like this for a few days now but i ve had this job for almost a year and this is a first, what could it be?