Mycosis nail fungus, also known as onychomycosis, is a fungal infection of the nail unit. It is more common in the toenails because fungi thrive in warm, moist environments like your shoes.

Toenail fungus often starts with mild nail discoloration or lifting. It’s not usually serious, but the nails may thicken, become brittle, or fall off without treatment. Nail fungus ...

It may take several months or even a year for your fungal infection to clear up. In the case of a severe and painfully malformed nail, your healthcare provider may suggest removing the entire nail ...

Onychomycosis, or fungal infection of the nail, most often affects the toenails. Infected nails usually have a thick, yellow appearance and can become coarse and brittle (see Figure 4).

You may have white spots on your nails if you have a fungal infection or a mineral deficiency. Getting manicures also cause white spots, since electric files can damage the surface of your nail.

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