The Best Way to Wipe Your Butt, According to the Experts

iStock
iStock

Curtis Asbury, MD sees it all the time. A patient comes in with blotchy, red, irritated rectum and insists they’re not doing anything unusual. Peering into their sore bottom, Asbury nods solemnly, then delivers news most people never expect to hear.

“You’re not wiping correctly,” he says.

A dermatologist practicing in Selbyville, Delaware, Asbury has seen an uptick in the number of people coming in expressing dissatisfaction with their rectal hygiene. Whether it’s due to misguided parental instruction during toilet training or wiping on sheer instinct, some of us are simply not maintaining one of the most potentially dirty crevices of our body. And the consequences can be irritating.

“It’s called perianal dermatitis,” Asbury tells Mental Floss, describing the kind of topical irritation that afflicts people who are wiping poorly, infrequently, or overzealously. In an attempt to clean their rear end, some people scrub so violently that the American Society of Colon and Rectal Surgeons has given a name to the resulting tenderness: Polished Anus Syndrome, or PAS.

Fortunately, the key to avoiding PAS and other rectal misadventures is relatively easy. Here are some pro tips for a clean butt.

GIVE UP WET WIPES

For starters, Asbury recommends that people stop using the pre-moistened cloths, which are heavily marketed to promote a sparkling cavity. Use of the wipes has been associated with allergic reactions to methylisothiazolinone, a preservative used to inhibit bacterial growth while products are on store shelves. “Even the all-natural ones can cause problems,” he says, since any kind of chemical present in the wipes isn’t usually rinsed off right away.

Does that mean you should reach for dry toilet paper instead? Not quite. “It’s healthier, certainly, to clean your body with water," Asbury says. "Nobody takes a dry piece of paper, rubs it over their skin, and thinks they’re clean.” Even the Greco-Romans (332 BCE–395 CE) knew this, as one historical account from the philosopher Seneca revealed that they used a damp sponge affixed to a stick as a post-toiletry practice. Of course, some ancient cultures also wiped with pebbles and clam shells, among other poor ideas, so perhaps we should stick with contemporary advice.

INVEST IN A BIDET

A bidet sprays water out of a toilet
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Asbury is an advocate of the standalone or add-on toilet accessory that squirts a spray of water between your cheeks to flush out residual fecal matter. While bidets are common in Europe and Japan, the West has been slower to adopt this superior method of post-poop clean-up; others might be wary of tapping into existing home plumbing to supply fresh water, even though DIY installation is quite easy. For those patients, Asbury has developed an alternative method.

TRY PAPER TOWELS AND WATER

“What I tell people to use is Viva, a really soft, thick paper towel made by Kleenex,” he says. “You get a squirt bottle and you leave it near the toilet and moisten the paper towel.” Regular toilet paper is usually too flimsy to stand up to a soaking, while normal paper towels are too harsh for rectal purposes. Viva is apparently just right. (And no, Asbury is not a brand ambassador, nor does Kleenex endorse this alternative use.)

This advice does come with a major caveat: Viva wipes are not flushable and might very well clog your pipes if you try to send them down the drain. When Asbury recommends the technique, he advises people to throw used towels in the trash. If you find that idea appalling, and provided your butt is not already red from bad wiping strategy, lightly moistening a wad of durable toilet paper should do the job.

DRY THOROUGHLY BUT GENTLY

Once you’ve wiped enough to see clean paper, take a dry square and mop up any excess moisture. Whether it’s wet wipes or bidets, some people don’t bother with this step, but “it would be weird not to dry,” Asbury says. Occasionally, moisture can lead to intertrigo, which is irritation in skin folds, or a fungal infection.

You also want to have a soft touch. “I see people scrubbing hard,” Asbury says. “That just makes the problem worse.” Excessive wiping can lead to micro-tears in the anal tissue, causing bleeding and discomfort.

WIPE IN THE RIGHT DIRECTION

Make sure to go from front to back, pushing waste away from the groin. This has traditionally been advised for women to keep poop away from the vaginal canal and prevent urinary tract infections. While Asbury hasn't found specific studies to back up this advice, he still believes it's likely more hygienic. There’s also something to be said for sitting while wiping, since ergonomically, it may keep your perianal area open. But if you’re uncomfortable reaching into the toilet to wipe, standing should suffice.

Assuming you’ve done all that and you’re still feeling discomfort, Asbury warns it might be something else. “If you’re not feeling clean, there could be issues with your sphincter,” he says. Weakened muscles can cause leakage. But generally, it’s dry-wipers who have trouble getting everything they need to get. For the hard-to-clean, Asbury advises that they make the switch to a bidet.

“It’s cold at first,” he says. “But you get used to it.”

The Reason Our Teeth Are So Sensitive to Pain

This woman's tooth pain is actually helping her avoid further damage.
This woman's tooth pain is actually helping her avoid further damage.
champja/iStock via Getty Images

On a good day, your teeth can chew through tough steak and split hard candy into pieces without you feeling a thing. But sometimes, something as simple as slurping a frosty milkshake can send a shock through your tooth that feels even more painful than stubbing your toe.

According to Live Science, that sensitivity is a defense mechanism we’ve developed to protect damaged teeth from further injury.

“If you eat something too hot or chew something too cold, or if the tooth is worn down enough where the underlying tissue underneath is exposed, all of those things cause pain,” Julius Manz, American Dental Association spokesperson and director of the San Juan College dental hygiene program, told Live Science. “And then the pain causes the person not to use that tooth to try to protect it a little bit more.”

Teeth are made of three layers: enamel on the outside, pulp on the inside, and dentin between the two. Pulp, which contains blood vessels and nerves, is the layer that actually feels pain—but that doesn’t mean the other two layers aren’t involved. When your enamel (which isn’t alive and can’t feel anything at all) is worn down, it exposes the dentin, a tissue that will then allow especially hot or cold substances to stimulate the nerves in the pulp. Pulp can’t sense temperature, so it interprets just about every stimulus as pain.

If you do have a toothache, however, pulp might not be the (only) culprit. The periodontal ligament, which connects teeth to the jawbone, can also feel pain. As Manz explains, that sore feeling people sometimes get because of an orthodontic treatment like braces is usually coming from the periodontal ligament rather than the pulp.

To help you avoid tooth pain in the first place, here are seven tips for healthier teeth.

[h/t Live Science]

Arrokoth, the Farthest, Oldest Solar System Object Ever Studied, Could Reveal the Origins of Planets

NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Roman Tkachenko
NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Roman Tkachenko

A trip to the most remote part of our solar system has revealed some surprising insights into the formation of our own planet. Three new studies based on data gathered on NASA's flyby of Arrokoth—the farthest object in the solar system from Earth and the oldest body ever studied—is giving researchers a better idea of how the building blocks of planets were formed, what Arrokoth's surface is made of, and why it looks like a giant circus peanut.

Arrokoth is a 21-mile-wide space object that formed roughly 4 billion years ago. Located past Pluto in the Kuiper Belt, it's received much less abuse than other primordial bodies that sit in asteroid belts or closer to the sun. "[The objects] that form there have basically been unperturbed since the beginning of the solar system," William McKinnon, lead author of one of the studies, said at a news briefing.

That means, despite its age, Arrokoth doesn't look much different today than when it first came into being billions of years ago, making it the perfect tool for studying the origins of planets.

In 2019, the NASA spacecraft New Horizons performed a flyby of Arrokoth on the edge of the solar system 4 billion miles away from Earth. The probe captured a binary object consisting of two connected lobes that were once separate fragments. In their paper, McKinnon and colleagues explain that Arrokoth "is the product of a gentle, low-speed merger in the early solar system."

Prior to these new findings, there were two competing theories into how the solid building blocks of planets, or planetesimals, form. The first theory is called hierarchical accretion, and it states that planetesimals are created when two separate parts of a nebula—the cloud of gas and space dust born from a dying star—crash into one another.

The latest observations of Arrokoth support the second theory: Instead of a sudden, violent collision, planetesimals form when gases and particles in a nebula gradually amass to the point where they become too dense to withstand their own gravity. Nearby components meld together gradually, and a planetesimal is born. "All these particles are falling toward the center, then whoosh, they make a big planetesimal. Maybe 10, 20, 30, 100 kilometers across," said McKinnon, a professor of Earth and planetary sciences at Washington University. This type of cloud collapse typically results in binary shapes rather than smooth spheroids, hence Arrokoth's peanut-like silhouette.

If this is the origin of Arrokoth, it was likely the origin of other planetesimals, including those that assembled Earth. "This is how planetesimal formation took place across the Kuiper Belt, and quite possibly across the solar system," New Horizons principal investigator Alan Stern said at the briefing.

The package of studies, published in the journal Science, also includes findings on the look and substance of Arrokoth. In their paper, Northern Arizona University planetary scientist Will Grundy and colleagues reveal that the surface of the body is covered in "ultrared" matter so thermodynamically unstable that it can't exist at higher temperatures closer to the sun.

The ultrared color is a sign of the presence of organic substances, namely methanol ice. Grundy and colleagues speculate that the frozen alcohol may be the product of water and methane ice reacting with cosmic rays. New Horizons didn't detect any water on the body, but the researchers say its possible that H2O was present but hidden from view. Other unidentified organic compounds were also found on Arrokoth.

New Horizon's flyby of Pluto and Arrokoth took place over the course of a few days. To gain a further understanding of how the object formed and what it's made of, researchers need to find a way to send a probe to the Kuiper Belt for a longer length of time, perhaps by locking it into the orbit of a larger body. Such a mission could tell us even more about the infancy of the solar system and the composition of our planetary neighborhood's outer limits.

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