Excessive nail polish use or fungal infections are the most likely causes of yellow toenails. However, yellow toenails can sometimes be a sign of a more serious underlying condition. Nails are ...

When Maria Delgado noticed a dark streak under her big toenail, she assumed it was from dropping her gym bag on her foot. Six months later, that seemingly innocent mark led to a diagnosis that saved ...

What is an ingrown toenail? Ingrown toenails, a condition also known as onychocryptosis, occur when the edge of a toenail cuts into the tissue surrounding it or when the skin around a toe grows over ...

If you're a runner, you know that black toenails are common—but that doesn't mean you have to put up with them. Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a ...

Wriggling toes in the sand and wearing sandals are warm weather treats, unless you’d rather keep your toes under wraps due to thickened, yellowish nails. Nail fungal infections (known as onychomycosis ...

Toenail discoloration is a common issue. Possible causes of discolored toenails range from minor toe injuries and fungal infections to more severe health conditions, such as melanoma. Toenails are ...

You should consult a doctor to examine or remove a damaged toenail, in order to prevent infection or other problems. The removal procedure only takes 15 to 20 minutes, but it can take up to 18 months ...

A badge of honour for ultra-runners, black toenails are caused by blood pooling beneath the nail. The most likely cause? Very long runs in ill-fitting shoes. "There should be 1cm between the end of ...

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