Many things can cause scaly feet.
You can treat this with antifungal creams.
Dry skin can also cause scaly feet. You treat this with emollients.
Eczema or psoriasis can cause reddened, scaly feet that you can treat with cortisone creams.
Sweaty feet with odor and scaling may be caused by certain bacteria that you can treat with antibiotics you apply to the skin.
For good foot care in general, keep feet clean and dry. When you wear sneakers, be sure to wear socks that absorb sweat and move it away from your skin. Inspect your feet often and see your doctor for any problems.
Treatment is different for the different causes of scaly feet. A correct diagnosis helps you get the right treatment sooner, before the condition worsens.