AMC’s drama “The Walking Dead” is a ratings blockbuster, and the zombie genre is frighteningly lucrative, having generated more than $5.74 billion from movies, video games, Halloween costumes, books, and more, according to MSNBC.com. One theory is that zombies reflect our anxieties of these scary times. Whatever the reason, we’ve seen zombies turn up in the most unexpected places like Sears where zombies are trying out treadmills and lurching around the outerwear department.

But maybe you’ve seen a zombie up close. Clues are bags under the eyes, decreased brain functioning, and irritability—zombieitis is a real epidemic, says the Better Sleep Council, a mattress trade group. The cure? They claim it’s a good night’s sleep on a quality mattress, and encourage you to report zombie sightings to them by supplying the zombie’s name and e-mail. Now that’s scary.