When growing up, did your parents ever tell you some medical facts that they thought were true, but are actually misinformation? Yes, there were and still are numerous health myths circulating that actually need to be debunked.
From old wives’ tales to playground “facts”, many of these beliefs were passed down with good intentions. They were meant to protect us. Yet some of them are simply outdated, while others are completely untrue. Let us unpack a few of the common health myths.
Myth #1: You must wait an hour after eating before you swim.
Many of us remember being told to sit on the side of the pool after lunch. The fear? Cramping that could lead to drowning.
In reality, there is no solid medical evidence that swimming after eating is dangerous. When you eat, more blood flows to your digestive system. However, this does not suddenly deprive your arms and legs of oxygen. At most, you might feel slightly uncomfortable if you exercise vigorously immediately after a large meal.
If you feel well, light to moderate swimming after eating is perfectly safe. The real risk around pools is lack of supervision, not lunchtime sandwiches.
Myth #2: Cracking your knuckles will cause arthritis.
This one health myth tends to worry people well into adulthood. The sound can be unsettling, so it is easy to assume it must be harmful.
The “crack” is caused by gas bubbles in the joint fluid collapsing, not bones grinding against each other. Large, long-term studies have not shown a link between knuckle cracking and arthritis.
That said, excessive or forceful joint manipulation can irritate surrounding tissues. If you have pain, swelling, or stiffness, that is worth discussing with your GP. The noise alone, however, is not the villain.
Myth #3: You lose most of your body heat through your head.
This health myth likely originated from early military research where participants wore arctic suits without hats. Unsurprisingly, they lost heat through the one uncovered area.
In truth, you lose heat from any exposed part of your body. Your head is not likely responsible. If it is cold outside, cover up properly. Gloves, jackets, scarves and hats all help. The key is overall insulation, not just a beanie.
Myth #4: Going outside with wet hair will give you a cold.
Colds are caused by viruses, not temperature or damp hair. You cannot “catch” a cold from the weather itself. However, colder months do see more viral infections. This is partly because we spend more time indoors in close contact with others, making it easier for viruses to spread.
If you develop a runny nose or sore throat after going out with wet hair, it is likely a coincidence rather than a cause. Good hand hygiene and staying away from unwell individuals are far more important than your lifestyle.
Myth #5: Reading in dim light will permanently damage your eyes.
Parents often said this out of concern. Reading in poor light can cause temporary eye strain, headaches, and fatigue. It does not cause permanent damage to the eyes.
If you or your child frequently experience headaches, squinting, or difficulty reading, that may signal a vision issue worth assessing. But the occasional bedtime story under soft lighting is not harmful.
Myth #6: You need antibiotics for every sore throat.
This is one of the most important health myths to challenge today. Most sore throats are caused by viruses. Antibiotics do not treat viral infections. Using them unnecessarily contributes to antibiotic resistance, which is a serious global health concern.
There are times when antibiotics are appropriate, such as confirmed bacterial infections like streptococcal throat. The decision should be based on symptoms, examination findings, and sometimes testing, not simply discomfort. If you are unsure, consult your GP rather than self-medicating or pressuring for a prescription.
Why do these myths persist?
Health myths often survive because they contain a small grain of truth, are repeated frequently, or were once based on older medical understanding.
Medicine evolves. What was believed decades ago may no longer be supported by evidence. The challenge is separating tradition from science.
When in doubt, ask
It is natural to rely on advice from parents and grandparents. They cared deeply and did the best they could with the knowledge available at the time. If you are ever uncertain about a healthy belief you grew up with, ask. A quick consultation can provide clarity and prevent unnecessary worry.
At Dr Claire Godwin’s practice, the goal is simple: clear, evidence-based guidance that helps you make informed decisions about your health and your family’s wellbeing. If you have questions about a symptom, a long-held belief, or something that you have read online, book an appointment and let us talk it through properly. Sometimes the most powerful medicine is simply the truth.
