10 Facts About Keratosis Pilaris From Dr. Pimple Popper

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Do you have tiny, red, rough bumps on your skin? You're not alone: The condition, known as keratosis pilaris, affects 80 percent of adolescents and 40 percent of adults. "It's one of the most common requests I get from people on social media and my YouTube channel," Dr. Sandra Lee, a.k.a. Dr. Pimple Popper, tells Mental Floss via email.

Lee created her new Body Smoothing System—which includes a body scrub and a lotion—in response to that feedback. "KP is such a common condition but there are not many products available over-the-counter that treat it specifically. Many people may not even know that they have keratosis pilaris and think that the bumps are acne or something else—so I really want to spread the word and educate on what this condition is as well as provide products that will help to control it." Here's what you need to know about KP from Dr. Pimple Popper herself.

1. THE CONDITION HAS A NICKNAME THAT'S FOR THE BIRDS.

The hallmark of KP is patches of small, rough, pimple-like bumps on the skin, according to Lee. It's caused by excessive production of a protein called keratin, which builds up until it plugs hair follicles (a.k.a. the pores) and causes those bumps to form. It's often called chicken skin because the condition resembles the skin of a plucked chicken.

2. IT RUNS IN FAMILIES.

What causes KP is unknown, but some reports suggest it's an autosomal dominant disorder, which means you only need to inherit one copy of the gene to get it. According to Lee, KP starts early—sometimes before a child is even 2—and flares up during adolescence. Thankfully, most KP fades by adulthood.

3. KP IS COMMONLY FOUND ON THE UPPER ARMS.

But that's not the only place it appears: KP can also be found on the front of the thighs, back, butt, or face. It can range in severity from just a few bumps to the majority of a particular area of the body.

4. THE BUMPS AREN'T ALWAYS RED.

KP bumps tend to be lighter and redder on fair skin, according to Lee. But they can also be white, pink, light purple, brown, or black—it all depends on the person's skin tone.

5. THERE ARE A FEW TYPES.

The type of KP varies depending on where on the body it's found. Beyond regular KP—which can either be rough, flesh-colored bumps or red, itchy bumps—according to Lee, there's one other variant to be aware of: keratosis pilaris rubra. It mostly affects teenage boys. The bumps are the same, but the skin is a bright, bright red.

6. IT'S WORSE IN THE WINTER.

Things like low humidity and cooler temperatures mean the skin is drier, which irritates KP. But it's not just winter weather that can cause KP to flare up. "Many people with KP will notice their condition worsen after they’ve spent time in the sun," Lee says. "This can be due to dryness that can worsen the bumps. In addition, unprotected sun exposure can also darken pigmentation and make KP more apparent on the skin."

7. THOSE WITH KP MIGHT WANT TO AVOID SELF TANNING.

It's not because self tanner is dangerous, Lee says, but "because KP lesions are hyperkeratotic," meaning the skin sticks up and is dry. "Self tanner will probably get stuck and collect in these areas, causing those areas to darken/stain more and then the KP would look more noticeable," she says. "Also, self tanner tends to dry the skin up more in general, so would probably aggravate your KP more, since KP has a lot to do with dry skin already."

If you really need to get that just-off-the-beach glow, Lee advises dabbing your KP with moisturizer or lotion "so that self tanner doesn't get caught in it, stain the area more, and make it more obvious."

8. IF YOU HAVE ASTHMA, YOU'RE LIKELY TO HAVE KP.

According to the American Academy of Dermatology Association, people with dry skin, eczema, hay fever, ichthyosis vulgaris (which causes dry skin), and asthma are more likely to develop KP. "I don't believe there is a direct correlation between asthma and KP," Lee says. "However, people who are atopic—[they] have dry skin and tendency for allergies and asthma—have a higher chance of having KP. People shouldn't worry that if they have KP that this means they will develop asthma."

9. IF YOU HAVE KP, YOU SHOULDN'T BE CONCERNED.

"It's a common and harmless skin condition," Lee says. "However, I know that these bumps can be uncomfortable and if they are more severe, [they'll] keep people from wanting to show their arms or wear short sleeves."

10. IT'S NOT CURABLE, BUT IT IS TREATABLE.

"If you have KP, you probably want to treat both the bumps and the dryness on your skin," Lee says. "You can treat the bumps by exfoliation—chemical and physical exfoliants/scrubs can help—and also [by] keeping skin hydrated! I would suggest finding products that contain an exfoliating ingredient such as glycolic acid and hydrating ingredients such as shea butter." The products in Lee's Body Smoothing System both contain 10 percent glycolic acid, making it good for treating KP (as well as skin that is generally dry or bumpy).

And, last but not least, Lee says you shouldn't forget your sunscreen: "It's important to remember to always use broad-spectrum sun protection, but especially on those areas you have KP."

9 Surprising Facts About the Scientific Study of Sex

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vadimguzhva/iStock via Getty Images

The scientific study of sex is much more exciting than an awkward sex ed class. While writing my book Sex Weird-o-Pedia, these were some of the most interesting facts about science and sex that I came across.

1. Some sex researchers didn't want their findings to get into the wrong hands.

The pioneering sex researcher Richard von Krafft-Ebing didn’t want his knowledge in the hands of ordinary folk. So he wrote Psychopathia Sexualis, the founding document of modern sexology—which was published in Germany in 1886 then translated and published in English in 1939—in Latin to discourage regular Joes (and/or Janes) from reading it.

2. You burn more calories mowing the lawn than you do having sex.

Young woman poses for selfie while mowing the lawn
Alina Rosanova/iStock via Getty Images

Sex might seem strenuous when things get hot and heavy, but it's usually not that great of a workout. You'd have to go at it for nearly 200 minutes to burn as much energy having sex as you do during a 30-minute run. Even mowing the lawn burns about three times more calories than sex. According to the British Heart Foundation, sex burns about the same amount of energy per minute as ironing clothes.

3. A surprising number of mothers claim to be virgins.

In a 2013 study of several thousand pregnant women in the U.S. published by BMJ, about 1 percent of the participants claimed they were virgins when they gave birth. This, of course, calls into question the veracity of studies that rely on self-reported sexual behaviors.

4. Penicillin may have ignited the sexual revolution.

One economist says that penicillin, and not the birth control pill, was the real enabler of the sexual revolution. A study published in the Archives of Sexual Behavior in 2013 shows that penicillin contributed to a 75 percent decline in the number of deaths caused by syphilis from 1947 to 1957. Since the new treatment made sex safer, people started having riskier sex, which resulted in increases in the numbers of children born out of wedlock and teenage pregnancies.

5. Twins can have different dads.

A photo of fraternal twins
Aleksandr Zhurilo/iStock via Getty Images

While it is very rare, it is possible for fraternal twins to have two different fathers. What’s more common is for a rom-com to be based on this scenario.

6. Gender may influence how people handle sexual jealousy.

Research from evolutionary psychologists indicates that people’s gender influences how they react to sexual jealousy. For men, they react more strongly to sexual unfaithfulness than emotional infidelity. For women, it is the reverse. The theory behind these behaviors comes back to evolution: Males who were intolerant toward their wives becoming sexually active with other men were less likely to become an object of derision and more likely to see their own genes pass onto future generations. Women who prevented their husbands from emotionally bonding with other women reduced the chances of the men spending their resources on other women.

7. One of Ivan Pavlov's colleagues created his own (slightly x-rated) conditioning experiment with dogs.

You’re probably aware of Russian researcher Ivan Pavlov and his famous conditioning experiment in which he trained a dog to salivate at the sound of a bell. What you might not know is that one of Pavlov’s American students, W. Horsley Gantt, conditioned dogs to become sexually aroused when they heard specific tones. The experiment, according to Mandy Merck's In Your Face: 9 Sexual Studies, was intended "to study conflicts of the drives between ... experimentally induced anxiety states and sexual excitement."

8. Couples whose first child is a girl are more likely to get divorced.

Parents pay attention to their phones instead of their daughter
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Married couples whose first child is a girl are more likely to get divorced than those whose first child is a boy. Scientists are split as to why this is. One theory is that female embryos are better able to endure maternal stress than male embryos, so pregnant women in unhappy marriages are less likely to have a miscarriage if the child they are bearing is a girl. But once they have a daughter, these couples are more likely to split up since there were already fissures in their relationship prior to the child’s birth.

9. There's a link between pubic hair and STIs.

A downside of pubic grooming is that it might raise STI risk. In a study conducted by a University of Texas scholar, people who regularly shaved their pubic areas contracted STIs about 80 percent more often than those who never shaved down there. One suggestion is that those who regularly shave are more likely to tear their skin, making it easier for viruses to enter the body.

Ross Benes is the author of Sex Weird-o-Pedia: The Ultimate Book of Shocking, Scandalous, and Incredibly Bizarre Sex Facts.

Airplane Water Quality Is Even Worse Than Previously Believed

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anyaberkut/iStock via Getty Images

While air travel is convenient, there's never any promise it will be particularly clean. Security checkpoint bins and airplane tray tables are notorious for harboring germs. In addition to being careful of what you touch, you need to be cautious about what you drink.

Air travelers have been warned in the past about the questionable water quality of major airlines. Owing to inconsistent water transport issues, storage methods, and lackadaisical monitoring, several studies and investigations—including a 2004 report by the U.S. Environmental Protection Agency (EPA)—have found bacterial contamination and even insect eggs lurking in liquid served to passengers in the form of coffee and tea.

Unfortunately, the problem doesn’t appear to be getting any better. A new study on the quality of airline tap water conducted by the Hunter College NYC Food Policy Center found E. coli, coliform bacteria, and other unpleasantries across 11 commercial and 12 regional carriers.

The study ranked airlines according to water quality tests, and whether airlines were forthcoming in disclosing how they handle water transportation and storage for in-flight plumbing, using a scale of 1 to 5. While some airlines, like Alaska and Allegiant, scored well at 3.3, others (including JetBlue, Spirit, Delta, and United) ranked poorly in terms of delivering healthy, clean water, which is often sourced from local municipalities.

Low scores also indicated a lack of transparency about the airlines' water monitoring process. Moving the water from its source through hoses and tanks can create opportunities for the water to become contaminated.

How can questionable water be served? While the EPA introduced an Aircraft Drinking Water Rule in 2011 that mandated quarterly cleanings of airplane holding tanks and bacteria tests, Condé Nast Traveler reports that the agency does little to enforce it, typically opting not to issue fines to airlines found to be in violation of the terms.

The study’s authors recommend people avoid drinking tap water, coffee, or tea while on airplanes and should instead opt for bottled water. Because the stored water is also used for lavatory sinks, it’s possible you might introduce germs to your hands even after “cleaning” them. Hand sanitizer is recommended.

[h/t Condé Nast Traveler]

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