Taking care of your hands and feet is a basic treatment but it can help to prevent disfunctions and diseases of the nails and feet.
A callus (or Tylosis in medicine) is a skin lesion caused by the increase of keratin production of vital skin cells as a response to a repeated biomechanical friction on the toe surface.
Very frequently its cause is the incorrect posture or walk, or the use of hard and tight-fitting shoes.
The result of these habits might be the formation of a small and extremely hard nucleus that, by pressing on the nociceptive nerve endings (dedicated to the transmission of pain) will cause discomfort and strong pain, which might increase during the day.
Removing calluses is the cure that will give immediate relief and restore the pleasure of walking.