Many people bite their nails at some point, especially during their childhood.
Healthline.com describes it as a type of body-focused repetitive behaviour that goes by the clinical name of onychophagia.
Nail biting can range from an occasional benign behaviour to a deeply ingrained self-mutilative behaviour.
Many people who begin biting their nails as children eventually outgrow the habit. For others, it becomes a lifelong habit that can be extremely difficult to quit.
