Quote:
Originally Posted by Clodfobble
Minifob's toenails were all ridged like that from about age 1 to age 4. We figured it was either a nutritional deficiency or a stubborn fungal infection in the nail bed.
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Fungus looks very different. It causes yellowing of the nail and lifts the entire nail; there's a lot of debris between the lifted nail and the nail bed. Very distinctive.
Vertical ridging is common; whether it's due to a nutritional deficiency is impossible to say. It could be due to almost anything - genetic, environmental, and everything else. There isn't enough information out there to say.