There are few things more reassuring than thinking you know how your body works. Unfortunately, some of the things people confidently believe about their health are about as reliable as diagnosing themselves after a five-minute Google search. From old wives' tales passed down through generations to seemingly harmless advice that everyone swears by, medical misinformation has a funny way of sticking around.

Doctors regularly come across health misconceptions that people accept as unquestionable facts, even when science says otherwise. Some might sound completely harmless, while others could lead to poor decisions, unnecessary worry, or even dangerous consequences when someone's health is on the line.

Recently, doctors shared some of the most incredibly common medical myths they wish people would stop believing, setting the record straight on misconceptions that have fooled people for years. Their explanations are a reminder that not everything we've heard about our bodies is true, and knowing the difference could be more important than we think.

#1

“I always get the flu when I get the flu shot.”

No you don’t. You’re welcome to refuse. But you don’t get the flu from the shot.

#2

That you shock someone when their heart rate is a flat line. This is always in TV and movies. When there is no heartbeat, there is no rhythm to shock. You have to get the heart going first. This belief drives me crazy

#3

So many patients think that the needle stays in their arm when we place an IV. The needle comes out and a thin plastic straw is what stays in. I educate at least one person a shift about this.

Medical myths often survive because they offer something that accurate medical information doesn't always provide: simple explanations and reassuring answers. Research shows that people are naturally drawn to health advice that makes complicated situations easier to understand, especially when they worry about an illness or are unsure what is happening to their bodies.

A straightforward explanation or an easy remedy can feel much more comforting than medical information filled with uncertainties and qualifications. These misconceptions are not necessarily the result of ignorance, either. They can give people a sense of control when dealing with something frightening or unfamiliar, which helps explain why certain beliefs become so deeply ingrained.

#4

The myth: eating absolutely healthy and refraining from vices such as smoking, drinking, and indulging in sugar will ensure you don’t get cancer. The reality: no. Someone who smoked like a chimney for 50+ years could very well not get a lung cancer of some kind, whereas your health nut aunt who has never smoked gets it. Cancer is a roll of the dice; by being a smoker, you just stack the odds in your favor that you’ll get it, but that is NOT a guarantee

#5

Some things I commonly have to clarify (PA student on my last clinical before graduation):

Antibiotics will not help your cold that you've had for 2 days and is clearly viral.

A "broken bone" is the exact same thing as a fracture. Broken bone is just the laymans term for fracture.

UTIs can become serious, or even deadly if left untreated for too long. Ignoring it & praying it'll go away is not the answer bro

The flu is common, but that doesn't mean everyone is guaranteed to feel crappy for a week & then feel totally better. It can be deadly for certain frail or immunocompromised people; don't send your sick kids to grandma's house.

No, vaccines will not give your child autism. That has been disproven so many times.

The ER is not the correct place to go for asymptomatic STI testing. Please go anywhere else, you'll be seen faster.

Any sudden loss of vision is an emergency. Hundreds of tiny bruises appearing all over your body overnight is an emergency. I wish the public was taught at least a few of these major red-flag symptoms we look for.

Mental health conditions can be equally as serious as physical health

Just because pregnancy is a natural process & you're otherwise healthy, does not mean pregnancy and childbirth are without serious risks that you need to be aware of when making decisions regarding pregnancy & childbirth

Alcohol withdrawal (from chronic daily use) can be fatal; seizures, delirium tremens.

-Medication assisted treatment is recovery. Just because someone is preventing withdrawal via prescribed medication (suboxone, methadone) does not inherently mean they're getting high

-We are NOT SNITCHES‼ Unless we are ordered by a judge to provide info, we are not providing anything to anyone. This never happened in the 2 years I've spent in the field. We are on your side, not the cops'.

#6

That passing away is the worst outcome. Take a walk through an LTAC and you will soon that there are many MANY things much worse than that.

There is a reason that most healthcare workers are very quick to make themselves DNR/DNI when their health starts failing.

Another reason these misconceptions are difficult to challenge is that they often contain a small element of truth. Someone who feels sleepy after eating a large meal, for instance, might conclude that a particular food is responsible, even when the overall meal is a more likely explanation. Human beings naturally look for patterns and connections, especially when faced with frightening situations such as serious illnesses.

Anxiety can make this tendency even stronger, encouraging people to find explanations where there may be no meaningful connection. Personal experiences also reinforce these assumptions. If someone starts taking a supplement and subsequently feels better, they might credit the product without considering that their recovery could have happened naturally or resulted from something else.

#7

My cholesterol and blood pressure and blood glucose are normal so I can quit the medications that accomplished this.

#8

That 92yo memaw is a fighter. We don’t care if she’s on a ventilator with a rectal tube and doesn’t open her eyes or talk. Memaw is in fact not a fighter, let her rest, please.

#9

"I"m a diabetic I've got to have something to eat" is invariable a phrase churned out by most diabetic patients whose blood sugars are consistently elevated, with a high BMI, complications of diabetes and who, in actual fact, would be helped a great deal by stopping eating with the regularity and pressure they seem to feel.
The risk for hypo is extremely low for most tablet controlled diabetics and the constant drip feed of calories from this myth about diabetics constantly needing to eat / have sweet tea puts constant additional strain on their bodies.

However, believing inaccurate health information can have consequences that extend far beyond an innocent misunderstanding. The Cleveland Clinic warns that following unreliable medical advice can cause people to delay seeking professional help, attempt unsafe treatments, or overlook symptoms that require attention.

Self-diagnosis is particularly concerning because people may mistake a serious condition for something relatively harmless and postpone getting the appropriate care. Depending on the situation, acting on incorrect information can also lead to harmful medication interactions, worsening symptoms, unnecessary anxiety, and even permanent physical injuries.

#10

Supplements are magical healing pills sold by selfless people who don’t have any ulterior motives but to make you healthier. Prescription pills are literal dog trash and/or poison and how dare I mention prescribing them??

#11

That you need to try to "dry out" a wound and let it scab. Wounds need the right balance of moisture to heal. There is no need to use rubbing alcohol or hydrogen peroxide to your average wound--they dry out tissue and end healthy new cells. Most of the doctors I work with are fine with allowing soap and water to rinse over a wound in the shower, saline is also a good option.

#12

That going on hospice means giving up and/or "lack of faith," and you should never do it until you are literally hours from passing away.

The best time to go on hospice care is the day you receive a terminal diagnosis, while you are still walking around, doing a lot of the things you like to do. Sign the papers! Let them simplify your medications and your list of clinic visits. Tell them what you would like to get done in the weeks or months you have left and they'll do their best to help you get those things done.

That's what I plan to do if I get the chance.

The growing availability of health information online adds another layer to the problem. Social media platforms make it easy for people to encounter medical advice through short videos, posts, and personal recommendations that can sound convincing without being medically accurate.

Repeatedly seeing similar claims can create an echo chamber in which familiar information starts to feel trustworthy, even when there is little evidence behind it. Online shopping also makes it increasingly easy to purchase medical tests, devices, and treatments without professional guidance.

Without knowing how to use these products correctly or interpret their results, people may end up making important health decisions based on inaccurate information.

#13

"Our ancestors did it and they were fine"
Me: No the hell they weren't. Have you seen their life expectancy?

#14

I want to scream every time a patient says they’ve “heard bad things” about statins. I can’t be bothered having the conversation about it, but I’m not allowed to say “well enjoy your stroke then” and let it go. I HAVE to have the stupid conversation about how their neighbours cousin got a frozen shoulder or some rubbish.

In other news, I might need a holiday.

#15

That menopause is just when you stop having periods. This completely ignores what we know about perimenopause symptoms starting for women as early as their 30s. And for women who have stopped menstruating, HRT causes cancer, and therefore you should avoid it. There are at least a dozen other myths about menopause I wish we'd stop believing

Interestingly, people's beliefs can sometimes influence how they physically experience certain symptoms. Psychology Today explores this through the placebo and nocebo effects, which demonstrate how expectations can contribute to improvements or unpleasant experiences.

The placebo effect occurs when someone feels better because they believe a treatment will help, even when the treatment itself has no active ingredients. The nocebo effect works in the opposite direction, as expecting negative outcomes can contribute to experiencing symptoms such as nausea or headaches.

These responses illustrate that the mind and body are closely connected, making people's expectations an important part of how they interpret their health experiences.

#16

Period pain bad enough to affect your day-to-day life is not 'normal'. No pain at that level is normal, and treatment should be sought and given.

#17

The idea that if someone has a concussion, they shouldn't fall asleep. You VERY much need sleep if you've had a brain injury or concussion. However, a person should be checked on to make sure they didn't fall unconscious, because that's a sign of a brain bleed that actually needs immediate attention

#18

That wearing glasses will make your vision worse. Or inversely, that not wearing your glasses as prescribed can make your vision worse. Neither of these statements is true. If your vision got worse, it would have gotten worse regardless.

This is driven primarily by genetics, growth, systemic health, and we are learning more about environmental influences such as vitamin D during childhood.

Oftentimes, your vision didn’t actually get worse; you just got to experience corrected vision and have gotten so accustomed to it that your uncorrected vision feels worse than before. Like upgrading to a 4K television and going back to your standard-def screen after a year. The quality didn’t change, but your perception of it did.

Expectations can influence how closely people pay attention to their bodies, how they interpret unfamiliar sensations, and how much anxiety they experience when taking medication. Someone who expects a treatment to work might become more aware of signs of improvement, while another person who fears certain side effects may become increasingly concerned about ordinary physical sensations.

This does not mean that symptoms are imaginary or that positive thinking can cure serious illnesses. Rather, it shows why health beliefs should be approached carefully, particularly when people begin interpreting every bodily sensation through the lens of something they have heard or read.

#19

ICU nurse. I frequently heard families and patients say that if someone was a DNR it meant we’d withhold treatment to try and harvest their organs.

In reality, there are extremely rigid criteria for who can safely donate their organs, and a DNR absolutely does NOT mean “do not treat”.

#20

For me, it's got to be any patient that uses the same logic that you would for a muscle, or a car even, and applying it to body systems.

For example, "No, I don't do flu vaccines. Sometimes your body needs to get a little sick so it can sweat it all out and rest and restart. Plus if you just keep getting the vaccine every year, then your immune system forgets how to work." I want to look at them and say, "What the hell are you talking about?"

#21

That their elevated blood pressure is “stroke level”.

Another important consideration is that medical knowledge itself is not fixed. MedlinePlus explains that scientific understanding changes as researchers gain access to better technology, conduct larger studies, and observe health outcomes over longer periods.

Information that was once considered accurate may eventually be revised when new evidence reveals that an earlier conclusion was incomplete or incorrect. This is part of how medicine becomes more reliable over time. It also explains why people should be cautious about treating old health advice as unquestionable truth, even when it has been repeated for generations. Being willing to reconsider familiar beliefs is an important part of making informed decisions about personal health.

#22

I'm a doctor and my mom said not to go jogging in the rain because I would get sick and I told her that's dumb, URIs come from viruses and not the rain, and then I got sick.

#23

people are always so nervous about air bubbles in their IV lines. tiny air bubbles are harmless, it would take a LOT of air to cause a problem.

#24

I'm a antimicrobial stewardship pharmacist.

Green sputum does not automatically mean antibiotics.

Smelly urine is not necessarily a UTI.

Bacteria in your urine doesn't necessarily need antibiotics if you don't have symptoms.

Sadly, there are plenty of providers and nurses who still believe these.

This is where health literacy becomes particularly valuable. MedlinePlus also describes it as the ability to find, understand, and use health information when making decisions about well-being. Rather than accepting advice simply because someone sounds confident, people should consider who is providing it, whether they have relevant medical qualifications, and whether their claims are supported by credible evidence.

Government health agencies, medical schools, hospitals, and established healthcare organizations are generally better starting points than anonymous accounts or unverified personalities. It is also worth being cautious about products promising extraordinary results, particularly when their sellers rely on miracle-cure claims or suggest that one treatment can solve numerous unrelated health problems.

After all, understanding the difference between convincing advice and reliable medical information can sometimes be just as important as knowing what to do when something actually goes wrong.

#25

Taking an ambulance to the hospital guarantees they'll be see faster or automatically get a room. Nope. If you have a low acuity complaint and we're busy you're heading straight to the waiting room.

#26

"I feel better after just a few days of those antibiotics, so I'm cured and don't need to finish the whole course my doctor prescribed me!"

No, please finish your antibiotics. If you were given a 7-day course and feel amazing after just 3 days, great! Please take the remaining 4 days. Just because you feel better doesn't mean all of the bacteria have been eradicated. Leaving a course half-finished breeds resistant strains and I can't tell you how many people have come back to the ER for a repeat UTI or ear infection that they stopped taking treatment for because "it got better after just a few days so I threw the rest of the pills away!"

#27

Dental: nothing is wrong if there’s no pain.

Medical myths can be surprisingly difficult to shake, especially when they come from people we trust or beliefs we've carried around since childhood. Some might seem harmless enough to laugh about, but others can influence important decisions about our health and keep us from getting the right help when we need it.

That's why hearing directly from medical professionals and being willing to question what we think we know can make such a difference. After all, when it comes to our bodies, a little curiosity and fact-checking can go a long way.

Have you ever believed something about your health for years, only to discover that it wasn't actually true? Share your experiences in the comments, and let us know which common medical misconceptions you think more people need to stop believing!

#28

That a shadowy council of masterminds has colluded to try and poison them with unnecessary therapies.

#29

Rust gives you tetanus.

It doesn’t. Chlostridium tetanus gives you tetanus.

#30

I don't want to take a painkiller, it just masks the pain.

Well duh.

I tell people that the painkiller will help them keep using their joint more normally while it recovers normally so that the muscles around the joint stay strong and the range of movement stays good.

#31

That getting a vaccine means you won’t catch it at all ever. I explain this a lot.

#32

Parents who try to have their young children “sweat out “ their fever and bundle them up tight in too many blankets.
I’ve carried too many seizing little ones to the critical room.

#33

Not eating sugar won't help your cancer go away. It will make you weak and less likely to survive treatment. Please don't fast on chemo

Your stomach is a bath of acid. Eating an alkaline diet will do nothing. Ever.

#34

That starting a medication will somehow dramatically worsen their life in ways that using alcohol, cannabis, and nicotine for years has not.

That “natural is better”. Ebola is natural.

#35

“I cut too many calories out of my diet so my body went into starvation mode and holds onto weight even more, that’s why I can’t lose weight”.

#36

That they are repelled by apples when, in fact, many doctors greatly enjoy an occasional apple.

#37

The idea that we can cure any disease, but we don't because treatment is more profitable.

#38

That you need to go to hospital after having a cold for two days.

#39

Wounds should not be left uncovered to "breathe" like we were raised.

#40

That older people have no rights and the hospital can admit to aged care home because family or the health staff feel that is best for them. If the person retains decision making capacity, they can do what they want. We don't have to like it.

Same premise with substances and alcohol. Can't make someone do what they don't want to/ aren't ready to do.

#41

That a break and a fracture are different things with significantly different severity levels.

Medical Professionals Debunk 41 Health Myths They Really Wish Everyone Would Stop Believing

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