Most Helpful Guy
This ointment called Carmex works real good for the lips
and does moisturize them plus stops them from developing
Most Helpful Girl
If you pick as a response to stress, than you need to spend some time figuring out what leads you to stress and then develop ways to cope that don't involve picking. For example, if you realize you're stressed, jot down after the event what caused it or why and then come up with other ways to handle like telling yourself to take deep breaths, or humming your favorite song or avoiding the stressor all together.
You're drinking plenty of water, so that's not an issue as you say, but I would suggest as someone else has already, Carmex. Great lip moisturizer.