In other words, credit has become a huge headache. And this is only one stress-related illness debt can cause.

The body's reaction to stress is part of the flight or fight response. We needed these responses to fight off bears and enemies. But when these same physical effects occur with stress about debt, they do more harm than good.

The physical effects of stress are mediated by the release of hormones, cortisol and adrenaline. These chemicals travel through the blood stream and cause your heart rate and blood pressure to increase. They also cause an increase in your breathing rate and an alteration in your immune system. While these physical effects are advantageous for fighting or fleeing, they become detrimental over time and can lead to heart disease, high blood pressure, diabetes, and even some forms of cancer.

Tossing and turning at night with visions of screaming collectors dancing in your head can even make it hard for you to lose weight. In a study in the Dec. 7, 2004, issue of Annals of Internal Medicine, researchers from the University of Chicago found that insufficient sleep cut levels of appetite-regulating hormone leptin. Leptin levels tell the brain when the body does or doesn't need more food. Low levels are associated with obesity. The upshot of sleep deprivation was weight gain.

And the pint of ice cream it takes to do the bills probably doesn't help, either.

"People definitely relate their health problems to their debt," Loral Langemeier, author of Guerilla Wealth and founder of Live Out Loud, a coaching firm in San Francisco, tells WebMD. "I hear about migraines, weight gain, digestive disorders."

"I heard a lot of mental symptoms," says Rudy Cavazos Jr., director of education and community relations of Money Management International in Houston, the largest nonprofit credit counseling firm in the U.S. and owner of Consumer Credit Counseling outlets in several states, recalling his days as a counselor.

"I used to get referrals from Employee Assistance Programs," he says. "The client would be sent from the workplace for being under stress, moody, angry, and unproductive."