I suffer from social anxiety disorder and I always bite the skin sorrounding my finger nails, how can i stop?

wear mittens with soap residue on them.That way if you try to nibble the mitt you won't like the taste.

difficult one. Try to do something else when that happens. As soon as you feel you are going to put your fingers in your mouth , jump up and go do something else. Or you could always put hot sauce on your finger tips.
Put something on that particular finger ,it will stop u until u lose that habit.
Cure; your; anxiety.
My sister did that too. You need to ask your doctor about it, and try to put something on your fingers that taste bad. The have medication for the anxiety you are experiencing. Good luck.
Take a anti-depressent that works for anxiety too.
the best answer is see a doctor they can help with either counseling or medication