Some may call it absurd. Some may call it vain. But Dr. Marcia Driscoll, a clinical associate professor of dermatology at the University of Maryland, assures us that lip balm addiction is real.

So what causes balm addiction? Dr. Driscoll points out that licking your lips can cause dermatitis, which is extremely drying -- and it's extra-tempting to lick your lips when they taste like candy.

Additionally, chapsticks can contain drying agents and irritants like menthol, scent and flavor compounds, and even plant-based ingredients. So the more you moisturize your mouth, the drier it gets -- sending you back into the vicious cycle of slathering on the balm.

Being a LipSmacker smackhead could also be all in your mind. Dr. Driscoll believes that most women severely overestimate the need to moisturize. In the grand tradition of "cosmeceuticals" -- beauty products pitched with enough science jargon to rival actual medicine -- the "lip care" industry is banking on women's obsession with the perfect pout. In fact, sales of lip balm grew to over $378 million last year, according to the Baltimore Sun.

Those who can't go five minutes without reapplying, however, do have a community of supporters to guide them through the agony of withdrawal. Lip Balm Anonymous, started by San Francisco Web site manager Kevin Crossman, is still in demand despite the fact that there have been no new updates in years. And, ironically enough, Facebook, a devastating addiction in itself, has 192 groups dedicated to chapstick (such as "Addicted to lip balm like CRACK").

We just hope this doesn't mean we'll be seeing lipstick-lover Gwen Stefani on season three of "Celebrity Rehab," barfing into a trash can as she withdraws from the gloss.

Tell us! Are you addicted? What beauty product makes you itch when you don't have it on hand?