I have this, I havent been diagnosed with anything but I think it's some form of arthritis. Mine began from standing on my feet too long. I do cakes as a hobby, and it involves standing for hours at a time. I've found only painkillers relieve it and memory foam slippers! Don't wear your shoes any longer than you have to. Do you find it's painful in the morning when you get up? It never goes completely, but it does ease from time to time