A member asked:

A couple of my nails have have very deep dents in them going across my nail, what's causing this?

3 doctors weighed in across 2 answers

Vitamins: This usually is due to a vitamin deficiency.

Answered 8/21/2017

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Transverse grooves: Transverse nail grooves, or beau lines, result from a temporary arrest of proximal nail matrix proliferation. Some causes are local trauma, local cutaneous disease (dermatitis, paronychia), medications, and viral infections.

Answered 2/9/2014

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