i chew my fingers too, as well as pick at them... one thing i have found out to stop this is... . . #1 clip my nails so there is ntohing to chew. #2 wear a bandaid on a finger so it gives me something to play with, so i dont pick my fingers. #3 wear gloves. . these are things i have discovered, somthing else to consider, i have also heard a rumor that the reaon people chew their nails is cause they lack a certain mineral in their system... not sure which one, and im not sure if this is true or not either.