Ridges in nails can develop due to a current or past illness or injury. A healthy nail is typically smooth or has barely perceptible vertical lines running from the cuticle to the tip. When there are ...

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Made up of layers of a protein called keratin, your nails serve as protection for your fingers and toes. Keratin, which also makes up the cells in your hair and skin, works to protect nails from ...

There are many different causes of peeling or splitting nails. Doctors call the condition onychoschizia. Treatments may include increasing iron intake, keeping nails short and moisturized, and more.

Nail disease can affect the health, strength, and appearance of fingernails and toenails. The following are some common nail conditions, causes, symptoms, and how to treat them. People living with ...