Life-saving warnings your nails are sending

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Blue or Brown Nail Discoloration

Nails may take on a blue or brown discoloration when exposed to Tetracyclines, Ketoconazole, Phenothiazines, Sulfonamides, or Phenindione.

Slate Gray Bands at the Base of Nails

If you get slate gray or blue bands at the seal of your nail bed, it can be a sign of Cyclophosphamide.