Re: Hard skin on balls of feet
It's just dead skin and your feet must reproduce the skin again. It's the healing process. Try getting the pedi-egg. I don't know if they have it there in England, but look it up and see if they sell them there.
My feet become hard like that from work and I have a horrible habit of not wearing shoes, so my feet compensate for the pressure and wear and tear and produce excess hard skin. The pedi-egg shaves it off quite smoothly, I love mine. And use a good moisturizing foot lotion too.