Nail-biting, also known as onychophagia, is a compulsive habit of biting the fingernails. In the United States alone, it's believed that up to 30% of individuals do it.

It's "nail-biting work", and it feels as if the pair are in "extreme danger" for much of the film: a "hidden camera could be detected or a slip of the tongue could expose them" at any moment.

But if yours are constantly breaking and refuse to grow, there’s hope. Despite what people believe, biting your nails won’t damage them in the long run. Rido – stock.adobe.com First things ...

Self injurious behaviors were associated with dysregulation, sensory hypersensitivity, age, sex, IQ, and language level in youth with autism.