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Medical myths are a widely discussed and highly relevant topic for everyone’s health and safety. In this list, we aim to debunk ten more persistent medical myths that continue to circulate. These myths could be shaping your beliefs or even putting your well-being at risk. So, read on to uncover the truth:
10. Hypothermia Only Happens in Cold Weather
We are all familiar with the fear of hypothermia, but many of us don't truly understand what it is or how easily it can occur. While hypothermia is often linked to the idea of 'freezing to death,' it’s actually more about a drop in the body’s core temperature rather than freezing. It can happen even in less extreme conditions.
Hypothermia happens when the body's core temperature drops below 35°C (95°F). Surprisingly, it doesn't only occur in cold climates. In summer, being exposed to a warm breeze after getting wet from swimming could trigger severe hypothermia. Cold river water can have a similar effect, and even swimming in warm, tropical waters can gradually lower your body temperature to dangerous levels, as water pulls heat from your body much more efficiently than air.
9. Consuming Excess Salt Can Be Harmful
Sodium-Free: Many product labels boast about being free of sodium, presenting it as a significant health achievement. This belief is based on unreliable studies, and sodium chloride (table salt) has been blamed for causing various health issues, leading to calls for its reduction or even removal from food products.
However, only a small portion of food items actually contain too much salt, and research has shown that few medical conditions require you to reduce your salt intake. In fact, some health conditions could actually benefit from an increased intake of salt, as long as it's natural, non-refined salt with a mineral profile that aligns better with human blood composition.
8. Car Crash Victims Often Die from Internal Injuries, Not Just External Trauma
When we are shown images of catastrophic car accidents, where the forces of physics have utterly destroyed vehicles, it’s easy to assume that death is caused by severe external injuries or fatal head trauma.
However, it can be surprising to learn that some car crash victims who seem to have sustained little visible damage still die. Even if you are securely strapped in and avoid being crushed or thrown against the vehicle, death can still occur. Here’s why:
When a car is moving at high speed, your internal organs are traveling at that same speed. If the car suddenly stops, your body is brought to a halt as well—often causing your organs to move forward and collide with bones, or force their way through gaps between ribs, resulting in fatal lacerations. This is known as shear-related blunt trauma.
7. Tarantula Bites Are Not Deadly
Tarantulas are often thought of as some of the most dangerous creatures, believed to cause death or serious injury with a single bite. However, contrary to popular belief, these large, hairy spiders are only mildly venomous and are actually quite docile members of the arachnid family.
Tarantulas inhabit subtropical grasslands, mountains, and rainforests, where they hunt a range of invertebrates and occasionally small mammals or reptiles. A bite may occur if a human handles a tarantula and it feels threatened, but never out of malice. While swelling, redness, and pain may follow a bite, human fatalities from wild or pet tarantulas are virtually unheard of. The real danger comes from the spider shooting its stinging hairs into your eyes.
6. Blind People Do Not Experience Complete Darkness
As humans, we often prefer thinking in clear-cut terms—whether in ethics, politics, religion, or even in classifying animals. However, in matters of health and disability, it's crucial to recognize the grey areas, the nuances in-between.
We tend to think of blindness as the complete absence of vision, but in reality, it’s more of a ‘grey area.’ The term ‘legal blindness’ encompasses a variety of visual impairments. Some people who are legally blind can perceive only basic shapes, others may struggle with limited fields of vision or focus. For some, the difficulty lies in recognizing shapes altogether. The surprising truth is that most blind individuals can still see at least something.
5. Ulcers Are Not Just Caused By Stress
"Don’t get so mad! You’ll give yourself an ulcer!" This phrase is frequently heard from well-meaning individuals who attribute the development of stomach ulcers to stress, emotional tension, or even consuming spicy foods, based on the commonly accepted belief that these factors contribute to gastrointestinal distress.
However, more accurate medical research reveals that the true culprit behind stomach ulcers is harmful bacteria, specifically the H. pylori bacteria, rather than stress or acid levels. This bacterium, typically transmitted through person-to-person contact, weakens the stomach’s mucus lining, allowing gastric acid to damage the sensitive stomach lining, resulting in abdominal pain.
4. Stretching Before Exercise Is Not Always Necessary
For many amateur athletes, stretching before a workout is seen as the go-to method to prevent injury and boost athletic performance. However, research has shown that excessive stretching before exercise might actually hinder performance. Studies have found that stretching before a run can reduce efficiency by more than five percent, and a study from Italy revealed that stretching can even decrease cycling performance.
Stretching may actually be an additional physical strain that drains energy and diminishes the potential for a strong start. Interestingly, our prehistoric ancestors likely didn’t have time to stretch when facing the immediate threat of a predator.
3. Spinal Injuries Are Not Always Permanent
Spinal injuries are among the most serious and devastating injuries one can experience, yet they are not as straightforward as they may seem. A common misconception is that spinal injuries always result in permanent disability, where once injured, one will be forever affected.
In reality, the range of spinal injuries is much more complex. Some individuals who are quadriplegic may later regain the ability to walk, while others may see partial recovery or improvements in their condition.
There is a longstanding myth regarding spinal injuries in motorcyclists, which claims that helmets with smooth surfaces can help reduce such injuries by allowing the head to slide along the road instead of halting suddenly due to friction. However, a scientific review of cases has found no statistically significant evidence, either for or against the use of helmets, when it comes to protecting the spinal cord.
2. Reducing Physical Activity Won’t Necessarily Protect You from Heart Attacks
Heart attacks are the focus of numerous misconceptions, many of which need to be corrected. A common belief is that heart attacks, which can affect young people as well as older individuals, are the result of excessive exertion. This leads to the conclusion that rest and avoiding exertion are key to heart attack prevention and recovery.
However, it turns out that a sedentary lifestyle, rather than physical activity, is actually the major contributor to many heart conditions. After experiencing a heart attack, remaining inactive only worsens the cycle leading to heart disease. The best advice, in fact, is to begin a moderate exercise program to rebuild the heart’s strength and improve circulation.
1. Tight Bras Do Not Cause Breast Cancer
In recent years, there has been growing concern among medical professionals and health commentators about a potential link between underwire bras and other shaping garments and the rising incidence of breast cancer. The theory was that the pressure from the wire on the breast tissue might obstruct the flow of lymph fluid, which is the body’s secondary fluid system, through the lymph nodes and ducts. Similar to how poor blood circulation can lead to oxygen deprivation, the idea was that reduced lymph flow could result in the buildup of toxic, carcinogenic substances in the breast tissue.
However, research has shown that no significant connection exists between underwire bras and restricted lymph flow, and there is certainly no established relationship between underwire use and any form of cancer.
