Help! Calluses on feet

Have any of you experienced OP persons noticed if their feet are less dry and scratchy after OPing for several months? Mine (especially lg toe and heel on my right foot) are awful. I thought when I early-retired and was no longer on my feet 8 hours a day wearing safety shoes, the problem would go away, but I was wrong. I do use a pumice stone after my showers and during baths, but the callus just keeps coming back despite using lotions and oils on my feet. What causes this callus build-up anyway? Is it a fungus? Someone told me it;s a form of athelete's foot. Thanks for any help. Jax Tweet