What happens to the body when you bite your nails?

Chronic nail biting can lead to issues like ingrown nails, bleeding and swelling, and no growth of nails. According to cosmetic dermatologist Dr Rinky Kapoor, the habit creates a breeding ground for bacteria, fungus and viruses that can cause an infection in the body. "It also harms teeth, gums, and leads to tissue damage in the mouth," added Dr Kapoor.