A lack of sleep could leave you struggling in the bathroom. Here's why.

By Sara Coughlin
March 29, 2019

Not getting enough sleep (a habit that many of us are guilty of) can throw off your entire day. But a lack of sleep is more than just a mood ruiner. It’s also associated with some pretty negative effects on your health—and, believe it or not, your bathroom behavior.

Digestive health experts have long believed that sleep quality and GI symptoms such as bloating, constipation, and diarrhea are connected in some way, especially among people with irritable bowel syndrome (IBS). Research even suggests that sleep disruptions might trigger flare-ups of inflammatory bowel disease. Sleep disorders and poor sleep may also affect the immune system and, in turn, GI health.

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But there’s still some uncertainty around whether a lack of sleep or low-quality sleep can be considered a direct cause of poop problems, Kyle D. Staller, MD, MPH, an instructor at Harvard Medical School and gastroenterologist at Massachusetts General Hospital, tells Health.

Certainly, he says, people who already deal with IBS or other gastrointestinal discomfort may very well notice that their symptoms get worse when they aren’t sleeping well: “Poor sleep is likely going to exacerbate or worsen certain GI issues.” It’s possible, he says, that you could go several nights without quality rest and notice an increase in discomfort, diarrhea, or suboptimal poops in the following days.

But, he adds, there’s also a chance your GI issues are so intense that they actually interfere with your sleep, thus reversing the cycle. Waking up in the middle of the night with the urgent need to poop is sure to mess with your sleep—although for the record, it’s also likely a sign of an infection and worth discussing with your doctor.

RELATED: How Often Should You Poop a Week? A Doctor Weighs In

Until more research is done, a sort of chicken-or-egg question remains: Does poor sleep cause poop problems, or are poop problems wrecking your sleep? Dr. Staller suggests that it’s better to think of sleep as a “volume control” for preexisting gut issues than as a direct trigger for them. Getting a good night’s rest can act as a solid preventive health measure and, if you’re already living with GI discomfort or IBS, it won’t hurt to work on improving your sleep schedule.

“It’s a way to potentially control symptoms, without going to the medication route,” Dr. Staller says. “And many patients are interested in a more natural approach to their IBS.”

If you’re among the 10 to 15% of U.S. adults with IBS, try establishing a bedtime routine that features a consistent schedule and rituals that ensure restful, high-quality sleep, like keeping your bedroom dark, cool, and free of screens. If nothing else, better sleep could reduce the amount of stress you live with—which, by the way, could improve your digestive health too.

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