What is clinical term for the disorder where one skin picks and bites lips more often than not?

I believe it represents some form of depression...What is clinical term for the disorder where one skin picks and bites lips more often than not?
instead of doing something else you just lead to projecting what you feel inside through constant picking and biting your lips you use it as a defense mechanism for you didnt let go of what you feel and what you must act and or you are tense and conscious.