They are produced by living skin cells in the fingers and toes. Malnutrition, crash dieting or eating disorders can affect your nails. And your nail growth rate is affected by disease, hormone imbalance and aging. Nail disorders make up about 10 percent of all skin conditions. Nails take a lot of abuse.
Most minor injuries heal on their own.
These are things that you may want to discuss with a physician. They are very resistant to treatment and toenails are more susceptible than fingernails. Wear sandals or shower shoes in public locker rooms, showers and pool areas. Keep your feet clean and dry. Change your socks and hosiery every day.