A member asked:

In the last couple of months i have developed a ridge in one fingernail. i have no other ridges, and have not injured any nail. could it be vitamins?

A doctor has provided 1 answer

Should not: Nail ridging due to thyroid or other problems shouldn't be limited to one nail. Show it to your doctor during your next check up though.

Answered 12/20/2012

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Thank

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A member asked:

What lacking vitamin causes horizontal lines under finger nails?

A doctor has provided 1 answer