The bottom of my friend lindsay,foot are crumbling what does she do?

The bottom of my friend lindsay,foot are crumbling what does she do?
She needs to see a doc for a diagnosis. Without seeing her foot there is no path of knowing what is wrong so she has to see her doctor.
if it is newly dry skin, she needs to exfoliate her skin within the bottom of the feet after soaking them within a warm soapy hip bath for 10 minutes.
If it is not dry skin, she should go to the doctor to create sure she does not have any type of fungal infection.
i abhorrence feet so i don't know how to sustain you sorry.