Nail fungus

If you frequent public showers or pools and don’t always don your shoes, you may be more prone to nail fungus, a condition medically known as onychomycosis.
The Mayo Clinic says common symptoms include nails that are:
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* Unusually thick.
* Crumbly and brittle.
* Ragged.
* Dull with no shine.
* Abnormally shaped.
* Unusually dark.