Biting your nails is a bad habit that should be stopped. Not just for the sake of your nails, but because most germs get lodged under the fingernails. Biting your nails is the quickest way to absorb all of those germs straight into your bloodstream.
"Wash your hands with a soft soap to kill germs hiding under the nails,"says Dr. Basco. "Don't bite your nails and avoid rubbing your nose or eyes with your hands. This is the best way to avoid spreading germs.