Mayo Clinic health letter (English ed.)
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Mayo Clin Health Lett · Sep 2012
I'm 76 and an avid walker. Lately, though, I've noticed a burning sensation and pain on the ball of my foot when I walk or stand--it's even worse if I'm barefoot or in socks. It feels like I'm walking on pebbles. The pain goes away when I'm off my feet. What might cause this?