I'm uncertain you have to "deal" with it. The only time you need to address it would be when it's an unhealthy / unhappy behavior. As with anything else habitual, the only way you're going to get someone to change their behavior is for them to realize it's unhealthy or causing them unhappiness. With that in mind my might be asking questions relating to her happiness / health.
Some people achieve balance by running from one end of the teeter-totter to the other, others stand in the middle of the teeter-totter We're all wired a little differently and as long as we're not doing ourselves damage then neither method is wrong.
