Runners are notorious for their deformed toes. Apart form wearing
Using toe pads and regular cleaning will help.
Thanks for posting your query.
In runners due to constant wearing of shoes and stress on the toes it is common to have nail infections, stress fractures and deformity of toes due to poor posture.
To avoid such problems the first thing that is needed is properly fit shoes with at least a thumb's width space between the great toe and tip of the shoe to protect it from compression or injuries.
Regular cleaning and moisturization is needed to protect against any skin infections. Regular pedicures help in maintaining a good health of the feet. Always cut the toenails straight and short, do not pull off the nails and keep them clean. In case of any injury consider immediate proper treatment.
You can also use silicone toe pads to protect the toes from injuries.
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Dr. Praveen Tayal.