Onychophagia
Onychophagia
is the habit of biting the fingernails of the hands. It is, if it cannot be controlled, a compulsion. It is an emotional disorder, which may require professional help. The person suffering from onychophagia can go to the extreme of exposing the skin and causing permanent structural deteriora.
Thanks for sharing
with pleasure.
I used to eat my fingernails for 6 years, and it took me 4 years to stop without any help. @elmor1000
I'd like to say the same about myself, but I've been doing it for most of my life and I don't know how to stop doing it.