Vitamins: This usually is due to a vitamin deficiency.
Answered 8/21/2017
4.7k views
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
4.7k views
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