Health & body

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• Would You Be Invincible If You Never Felt Down? What the “Mental Brakes” Metaphor Can and Can’t ExplainImagine someone who never feels down, pays no attention to fatigue, and moves on after every failure.
• Why Is the “Sleepy Jerry Took Over the Internet” Post So Funny?The joke in the “Sleepy Jerry took over the internet” post isn't that Jerry looks exhausted.
• Does 1 in 8 Billion Have a Best or Worst Ending? Death Causes, Longevity and Routes Explained1 in 8 Billion does not publish a menu of mutually exclusive endings called “Millionaire,” “Scientist” or “Happy Family.” A simulated life contains overlapping…

This week’s archive picks

Each week we rotate in a few older articles from this theme, taking turns through all of them.

• Beyond “this is unbearable”: 29 years of intensive caregiving, the respite gap, and the limits of prenatal diagnosisThe first reaction to this case is simple: this is devastating.
• Does a PDRN caffeine serum reduce facial puffiness? 2% caffeineThe question usually starts simple: “Will this reduce puffiness?”
• Free facial beauty advice, checked against the researchBeauty professionals often give quite sensible practical advice wrapped in explanations that are simpler and more certain than the science.
• Why Do Mental Health Clinics Require Masks, and Can They Refuse You for Not Buying One?Even now, you may walk into a mental health clinic or hospital in Japan and hear this at the front desk:

Topics in “Health & body”

• Sleep and dreams
• Beauty and appearance

All “Health & body” articles, newest first

Newest first

• Why You See Dream-Like Images Before Sleep — and How to Increase the Chance of Dreaming What You WantSometimes, when you close your eyes before sleep, images start playing in your mind even though you do not feel fully asleep yet.
• Falling asleep around 8 PM does not mean you lack willpowerYou keep falling asleep around 8 PM.
• Part I — What Is Happening in People Who Cry Easily?The age-based rule becomes progressively harder because the benchmark itself rises by ¥10,000 every year.
• Is Sleeping Until 1 PM Oversleeping? Transition Anxiety, Long Return-to-Sleep Dreams, Air Conditioning, and Recovery SleepA person fell asleep around 3 or 4 a.m. and slept until approximately 1 p.m., for a total of about nine to ten hours.
• Vitamin C Serum, Then Itchy Red Bumps in Three Days? Retinol, Chin Breakouts, and Peeling Beside the NoseVitamin C in the morning, retinol at night.
• Does anal sex make your anus loose or cause fecal incontinence? What the statistics actually showThe internet can turn one health question into a horror story very quickly.
• Why Do Antidepressants Cause Weight Gain, Even When You "Ate Nothing"?Some people do gain weight on antidepressants, but the pill doesn't make fat out of nothing.
• How Is Hibernation Different from Sleep? Separating an Energy-Saving Body from a Sleeping Brain“Do hibernating animals sleep for months on end?”
• Can Mice and Flies Seem “Depressed”? What Sweet Water and Flies That Stop Climbing Can Tell UsA mouse that no longer shows much preference for sweet water.
• Would You Be Invincible If You Never Felt Down? What the “Mental Brakes” Metaphor Can and Can’t ExplainImagine someone who never feels down, pays no attention to fatigue, and moves on after every failure.
• Do Hibernating Animals Sleep the Whole Time? How Metabolism, Body Temperature, and Sleep Help Them Through WinterAn animal retreats to its den for winter and reappears in spring.
• Do Mice and Flies Get Depressed? Looking Closer at Animals That “Don’t Move”A mouse that chooses sugar water less often, and a fly that stops trying to cross a gap.
• A researcher’s mind, a cat’s body: what does a bedtime “meow” actually do?Tomorrow is planned.
• How Could Yani Neko Quit Smoking? Building Support Beyond WillpowerSuppose the protagonist of 『ヤニねこ』 (Yani Neko) announced a serious wish to stop smoking.
• Does 1 in 8 Billion Have a Best or Worst Ending? Death Causes, Longevity and Routes Explained1 in 8 Billion does not publish a menu of mutually exclusive endings called “Millionaire,” “Scientist” or “Happy Family.” A simulated life contains overlapping…
• Why Can Masturbation Feel Satisfying Yet Still Not Replace Sex With a Partner?Description: Orgasm and physical stimulation are only part of what some people want from sex.
• Face Itchy and Red After Changing Cleanser?If your face becomes red and itchy after changing your cleanser, the new product should be one of the first things to suspect.
• Someone Said Your Face Looks Puffy, But You Cannot Tell?“Your face looks puffy today.”“Are your eyes swollen?”“Your face looks a little different.”
• Why Walking Alone May Not Make Your Weight Drop — What a Broken Gym Habit Teaches Us About Restarting“I still walk, but my weight is not going down.
• COSRX The Vitamin C 13 Serum: How Many Drops, When to Use It, and Whether It Goes Before or After Toner and MoisturizerCOSRX The Vitamin C 13 Serum looks simple until you actually hold the bottle.
• Born in Late December? When Were You Conceived? Estimating It From Your BirthdayIt is an extremely awkward question with surprisingly neat math:
• What Does “NGL I’m Gonna Nap, LMK” Even Want You to Do?“NGL I'ma take a nap LMK” is a message that sounds like a perfectly normal sign-off until its final three letters. Let you know what?
• Why Is the “Sleepy Jerry Took Over the Internet” Post So Funny?The joke in the “Sleepy Jerry took over the internet” post isn't that Jerry looks exhausted.
• Did Sleepy Jerry Really Take Over the Internet, or Did Someone Just Say So?Someone declared the takeover. Not everyone got the memo. Sleepy Jerry is the tired cartoon mouse scrolling his phone in bed.
• “Because He Doesn't Sleep” Isn't an Explanation: How Takasu vs. Hori Became a MemeDr. Mikiya Takasu asked in a YouTube video why Daisuke Hori “keeps lying.” The comments solved this serious question instantly: “Cause: He doesn't sleep.”
• Masuda, Anonymous, and This Man: Three Internet Mysteries, One Very Confused Bald GuyA simple question—“Who is Masuda?”—somehow turns into a grinning hacker mask and a balding man who supposedly appears in everybody's dreams.
• Why Do Smells Become Unbearable During Pregnancy? Could Poop Ever Smell Amazing?Someone at work keeps covering their mouth with a handkerchief. Could they be feeling sick? Could your scented hair oil be bothering them?
• Why Do I Get Sick After a Public Bath? Crowding, Cold Exposure, and Timing“I go to a public bath, and a couple of days later I catch a cold.”
• Do Women Masturbate Too? Why It Can Feel Like an Urban Legend — Frequency, What People Watch, and the Surprisingly Unanswered “Do They Get Fully Undressed?”“Women have sexual desire and women masturbate.”
• Why can autistic or ADHD people seem unusually mature in philosophical conversations? Liking philosophy is not a diagnosis, and thinking a lot is not the same as thinking deeplyA familiar internet observation goes like this:
• Why Do Mental Health Clinics Require Masks, and Can They Refuse You for Not Buying One?Even now, you may walk into a mental health clinic or hospital in Japan and hear this at the front desk:
• Is a 9% 500 mL can really one drink? It's about 2.6 beersA 500 mL can of 9% chuhai (a Japanese canned spirit-and-soda drink) looks like one can, but it holds 36 g of pure alcohol.
• What Happens to Your Dreams and Appetite After a Very Long SleepSleeping extremely long just once doesn't automatically mean something is wrong.
• I Drank Yakult 1000 and Still Slept 10 Hours. Maybe That's Sleep Debt Being Collectedsleep-debt-yakult1000-long-sleep.md
• ED Pill Worked, but You Lose It Right Before Penetration? Here's WhyThe key point is that he wasn't hard for two straight hours.
• Blood Pressure 155 to 122: Why You Feel Fine Once You Reach the DoctorMy blood pressure was high.
• protect the barrier before optimizing the serumRetinoids can cause dryness, redness, itching, and stinging.[
• Chilly at 28°C, then kept awake by mosquitoes: how to adjust the airflow and ease the itchYou work up a sweat walking on a hot day, then step into the shade and feel a chill on your arms.
• Retinol Serum Made Only My Nose Itch: Don't Hurt Your Face Trying to Beautify ItI put on a serum.
• Tired legs after a long walk: what to do today and when to get helpIf your legs feel mildly heavy after a long walk, start by taking the load off, drinking some water, eating your usual meal, and making time for sleep.
• Why Do the Japanese Live So Long? What You Eat and Which Diseases It CutsIn 2025, life expectancy at birth in Japan was 81.35 years for men and 87.33 years for women.
• Can Yakult 1000 Actually Make Irritation Go Away?Some people say they sleep better after drinking Yakult 1000 (a probiotic milk drink sold in Japan, also called Y1000).
• Why You Can Have a Dad Belly at 27: Sales Jobs, Drinking, Stress and Visceral FatThis article isn't a diagnosis of any particular person.
• A nap at Satsuma-no-Yu: Sakurajima was my login bonusAfter a bath at SHIROYAMA HOTEL Kagoshima, I slept for 15–20 minutes in a chair. Waking up to Sakurajima was the best part.
• Wet dreams happen but masturbation never ends in ejaculation: painImagine this adolescent-health question:
• Still tired after water, food and a nap? Early cold, sleep inertiaYou drank water. You ate. You even had yogurt. Then you slept for five hours in the middle of the day.
• Still Feel Heavy After 2 Liters of Water? Check Food, Protein, Alcohol, RestFor a week or two, your body feels strangely heavy. Your legs feel sluggish. You can still walk, think, work, and make things, but you do not feel restored.
• Two Beers and the World Starts Spinning, Eight Drinks and You Feel Fine: Why Alcohol Hits Differently on Different DaysThe same person can feel dramatically different after alcohol on different days.
• Why can back training ease neck-and-shoulder stiffness when walking does not? Moving and loading are not the same thingWalking is excellent exercise.
• Why Strength, Endurance and Cardio Don't Come as One “Fitness +1”When people say "you have good physical fitness," they are putting quite different abilities into the same box.
• Isn't male libido supposed to peak in the 20s? A 67,334-person studyThe 2026 Scientific Reports study analyzed 67,334 Estonian Biobank participants aged 20 to 84.[S1]
• Takoyaki Party, 90 Minutes of Career Advice, Then “I’m Sleepy, Go Home”It was another casual takoyaki get-together, roughly the second time.
• Why no styes despite staring at a phone all day? The eye-strain mythMicroscope at work. Phone during breaks. Manga or other close-up reading at home.
• Shaving out of my life: how many laser sessions for a beard?You get medical laser hair removal. Growth slows down. Density drops. Then a few days later, the beard shows up again with perfect attendance.
• Mobile Suit GundamWhen “ADHD Is Actually High Performance” Turns Into a Gundam Spec Sheet: The Self-Referential Bug in Neurodivergence PostsSpend enough time reading social-media posts about ADHD or autism and the discussion can start to sound less like clinical psychology and more like a machine…
• What is ceramide, really? Skincare sorted by function, not labelAt a drugstore, the vocabulary becomes chaotic fast.
• Professional esthetician vs scientific skincare: a fact-checkA facial can produce a surprising amount of advice: pollen may irritate the skin, direct fan air may dry the face, moisturize quickly after washing, use…
• Free facial beauty advice, checked against the researchBeauty professionals often give quite sensible practical advice wrapped in explanations that are simpler and more certain than the science.
• Firmer skin with sensitive skin: don't wear full armor on your faceThe skincare aisle can make toner, lotion, emulsion, serum, cream, balm, petrolatum, retinol, vitamin C, and niacinamide all look mandatory.
• Retinol can anger your skin first: irritation isn't a level-upA common skincare conversation goes something like this:
• Adding more product made my greasy bangs worse: what to separateBangs can look fine in the morning and turn into thick, shiny strands by afternoon.
• Does a PDRN caffeine serum reduce facial puffiness? 2% caffeineThe question usually starts simple: “Will this reduce puffiness?”
• Why do people leaving police detention often look well groomed?A person has spent several days in a police detention facility. Then the door opens for release.
• Why do very heavy older men seem to disappear after 70?Walk around almost any city and men in their forties or fifties with large bellies are easy to spot.
• Are Free Facial-Esthetic Training Models Actually a Good Deal? Try the Free Version Before Turning Your Face Into a SubscriptionBeauty-booking platforms regularly show listings such as “new staff monitor,” “training model,” or “facial treatment ¥0.”
• Buying ED medication cheaply on DMM: unit price vs total spendOpen the booking flow for ED treatment.
• I lost my ED medication and my wallet collapsed first: real costs“I put the pills somewhere.”
• A center part goes wrong with volume everywhere: lift only the topThere is a funny moment when comparing portraits.
• Why a young man can look like an exhausted aristocrat: hair, fatigueYou see a man you still mentally file under “young.”
• Beyond “this is unbearable”: 29 years of intensive caregiving, the respite gap, and the limits of prenatal diagnosisThe first reaction to this case is simple: this is devastating.
• A 30-minute sleep stream became adult observation: Daisuke HoriPut the stream on a 50-inch television and the premise immediately looks strange.
• Can a routine health check find every cancer? Reducing "too late"Japan’s 2023 data show an overall cancer incidence of 105.4 per 100,000 among people in their 30s, about 15,000 diagnoses per year.[
• The Station Toilet Is Behind the Gates: What Happens If You Tap In and Try to Exit the Same Station? — Ticket Gates vs. Your ColonYou have just left a station when your body sends an emergency alert:
• Does wearing a hat all day cause baldness? What research says“Wear a hat every day and you will eventually go bald” is one of those claims that refuses to die.
• Why Wear a Crop Top? It's Not Always About Showing SkinTry the same high-waisted jeans with two shirts: one long enough to cover the waistband, the other stopping just above it.
• Is bringing notes to the doctor annoying? Build a visit README, not a feelings diaryWhen people see a doctor post that they “brace themselves” when a patient hands over a long summary, some may hear a different message: “I should bring nothing…
• Why can hands shake when thyroid tests are normal?A health check included thyroid testing. Thyroid-stimulating hormone, free T3 and free T4 all came back within that laboratory’s reference ranges.
• Can you style a center part with just a blow-dryer?It looks great at the salon.
• Why can long gray hair make a young person look older? +6 yearsImagine a young man whose face alone looks youthful and actor-like, but whose long hair is dyed white.
• Can "Rashomon?" pop into your head when sleep-deprived? CreativityImagine seeing a long-haired person with white hair and instantly thinking, “Rashōmon?”
• Why Can a Young Man With Long Gray Hair Look Like an Old Woman? Researchers Actually Tested the Hair CuesAt a casual restaurant, a young-looking man with long hair dyed white briefly registered, from a distance, as an older woman.
• Same person, millimeters of beard, different impression: 100 msFacial hair has disproportionate visual authority.
• A Sleepless Day: Health Checkup, a Free Monster Energy, and City Hall PaperworkThe day had already begun with repeated identity-card scans for an online government procedure and another round of explanations at a medical checkup.
• Confirmed in advance, reset on health-check day: patient as backupIt was the morning of a pre-employment health check, and the patient was already short on sleep.
• Awake Before a Health Checkup: Can One Bad Night Shift Your Test Results?The sequence is almost too perfect.
• Can a urine test reveal masturbation before a health checkup?A standard urine test is not designed to determine whether someone masturbated.
• ISO outside, nonsense inside: incongruity, manzai and AI humorTelling an AI to “make it funny” often produces laughter cues instead of humor: slang, exclamation marks, and the textual equivalent of someone laughing at…
• Did the Blood Pressure Drop Only Because of the Drug? — Using EMA5 to Read the “Medication + Sleep + Stress” BundleIf home blood pressure falls after an antihypertensive is started, that does not prove “the drug did all of it.”
• Your heart is moonlighting as the AC department: heart rateWorking muscles generate heat. In cool conditions, getting rid of that heat is easier. In hot conditions, the body has to work harder to cool itself.
• Run a Marathon Even If You Hate Training: The “Gratitude Walk” MethodThe point is not more willpower. It is a system that needs less willpower.
• You Can Build Fitness Without Running: Walking, Cardio, Blood Pressure, and RetinolBeing able to walk for a long time while getting exhausted quickly when jogging is not contradictory.
• Does a 5 A.M. Walk Count After a Bad Night of Sleep?It's 5 a.m. You slept badly, but the streets are cool and quiet.
• How many minutes of exercise matter? The biggest win is 0 to 150Before holding a conference on optimal intensity: increase the weekly total first. The “just do it already” meme is annoyingly evidence-friendly.
• Why do some people look ridiculously young? Jawlines, UV, retinolSome people are in their forties and still get read as thirty-something.
• It’s 5 a.m.: the body says “sleep,” the brain says “still open”It is 5 a.m.
• What Does Everyone Actually Do on Their Days Off? — The Truth Behind “Nothing”: Phones, TV, Sleep, and Capybara ModeJapan’s 2025 Cabinet Office survey found that the most common ways people spend free time were sleep/rest (53.7%), TV/DVD/CD viewing (46.8%), hobbies and…
• Mind says go, body says hold: context-dependent arousal explainedThere is no contradiction in being easily aroused by erotic media or fantasy while having difficulty responding physically during real-life partnered sex…
• Why do bangs look like seaweed even when they aren’t greasy?Your bangs gather into flat strips instead of falling in separate strands. You pull them apart with your fingers; they stick together again.
• Was an 18-Hour Sleep Day Recovery Sleep? How to Understand Long Sleep and Changes in DreamsI slept from midnight to 1 p.m., for 13 hours.
• How Dangerous Was Childbirth in the Heian Period? — Expectations to “Carry on the Family” and the Physical Risks to Mother and ChildHeian-period romance can look elegant when viewed through waka poetry and visiting marriage customs.
• Grunting at the Gym: Does It Help, and When Is It Too Loud?You're midway through your workout when a loud grunt comes from the next rack. For a second, it feels as though an unexpected boss fight has started.
• Having No Friends Is Not Always a Personality Problem: It May Be a Route, Fatigue, or Lifestyle ProblemWhen you have no friends, it is easy to wonder whether something is wrong with your personality.