A fungi or bacterial infection in the bed of the nail can cause the nail to turn orange. Smoking cigarettes frequently can also cause the nails to turn orange.
Betacarotene found in fruits and vegetables can cause fingernails to turn orange when taken in high quantities.
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Yes, it can.
The presence of iron usually leads to a reddish colored soil.
The color of your fingernails should never be orange, healthy fingernails have a slight pink hue to them. If you wear nail polish without a base coat first, overtime the polish can stain your nails, this will happen with dark colored lacquer. If only a couple of fingernails look a little orange, maybe, it could be the start of a fungus infection, although usually your nails will look white to brownish in color if this is the case.
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The deep *vertical* lines in your fingernails are genetic. If you have *horizontal* ridges in your nails, you should see a doctor.
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You can use your fingernails to break the skin or use a plastic tool to do it. Then peel back with your fingers.
Fingernails are normal in the human body. Please be more specific in your question.