Nail biting Right up there with playing with your hair is biting your nails, which not only gives off a nervous vibe but can also hint at another weakness: bad personal hygiene. If such a noticeable part of you appearance looks unkempt, flaky, or is bleeding, "people may assume that you are not paying attention to details," says Leah McAdaragh, a National Sales Manager. "Plus, the habit can indicate an inability to remain calm in urgent environments."
Bottom line: "Nails don't have to be polished, but they should be clean and manicured," says McAdaragh. If you're a biter, try a color on your fingertips so you're less inclined to nibble.
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