Question

How can biting your nails be harmful to your health?

• A. It makes your nails too short.
• B. It transfers bacteria between your mouth and hands.
• C. It makes your teeth more brittle.
• D. It prevents bacteria from digesting food in your mouth.

Answer 1

The correct option is B

It transfers bacteria between your mouth and hands.

Biting your nails can raise the risk of catching a cold or other illness because you're putting your unwashed hands in your mouth. When you bite your nails, those bacteria end up in your mouth and gut, where they can cause gastrointestinal infections that lead to diarrhoea and abdominal pain. Nail biting usually leads to deleterious effects in fingers.