Published on March 11, 2021, Updated on March 11, 2021

Nail biting, also known as onychophagy or onychophagia (or even erroneously onyhophagia), is an oral compulsive habit of biting one’s fingernails. It is sometimes described as a parafunctional activity, the common use of the mouth for an activity other than speaking, eating, or drinking.


Source: https://en.wikipedia.org/wiki/Nail_biting