A member asked:

What causes skin buildup under toe nails?

2 doctors weighed in across 2 answers

Fungus: You might have fungus. If your nails are curved or incurvated callus can build up in the nail grooves due to pressure.

Answered 6/22/2020

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Likely: Nail fungus is cause. Podiatrist will take a small biopsy of nail to find out for sure.

Answered 11/6/2018

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