Frequently asked questions about nail biting

Are people addicted to nail biting?
What are the causes of nail biting?
What are the main reasons for stopping nail biting?
What is the best way to stop nail biting?
What is nail biting anyway?
How do I open the Raylex pen correctly?
Can I use Raylex longer than 18 days?
Can I use Raylex to prevent/unlearn thumb sucking habit?
Can Raylex be used by pregnant women?
Can I use Raylex before I put my contact lenses?