Ingrown toenails occur when an edge of the nail grows into the skin, which can then get red and infected. Ingrown toenails can happen if you cut into the corners of your toenails when you trim them. This condition can also be caused by wearing shoes that are too tight. A bunion forms when the big to slants toward the small toes, and a bump forms at the base of the big toe. This spot can get red, sore, and infected.
Bunions often run in the family and can also be caused by wearing shoes with pointed toes.
Plantar warts , which form on the bottom of the feet, are caused by a virus. They tend to go away without treatment. Hammertoes form when a foot muscle gets weak, shortening the tendons, which then retract the toe, causing it to curl under the foot and creating a bump at the joint on the top of the toe. These areas can become sore, and hammertoes can cause problems in walking and in finding comfortable shoes. Top of page Dry skin can become cracked, allowing germs to enter.