Didn't know there was a cream!

I put a couple of tablespoons of epsoms in a bowl of lukewarm water and soak my feet when they're really bad, and it does give me some relief, although it hurts initially to feel the water... For my knee, I wrap the epsoms in a damp cloth and lay it on the skin. I don't do it all the time, only when things are bad - anyone know if there is a cumulative effect with them? Is it worth doing every day?

Bram.