Why Does Bad Weather Aggravate Old Injuries?

dragana991/iStock via Getty Images
dragana991/iStock via Getty Images

Reader Jen wrote in to ask, “Why do old injuries ache during crummy weather?”

“Oh, my bones are aching. It must be about to rain.” - Everybody’s grandpa, ever.

The idea that certain aches and pains correspond with, and can even predict, the weather is widespread, and has been around since at least the days of ancient Greece.

The typical explanation for bad-weather-related aches is that the drop in barometric pressure that comes with a storm causes soft tissue and fluid around joints to expand, irritating nerves and causing pain, especially at the sensitized site of an arthritic joint or an old injury.

The scientific evidence for the phenomena, which has been studied since the early 20th century, is mixed.

Some studies have found that changes in barometric pressure increased pain, others found that it decreased it, and still others found no correlation. The influence of temperature and relative humidity has also been studied, and is also unclear. (For more on some of this research, see here and here).

A big hurdle to studying the problem is that the swelling happens on such a small scale that it’s difficult to objectively detect and measure, so researchers have to rely on people’s subjective accounts of pain, which aren’t always reliable and are hard to compare from one person to another.

While one study suggests that the phenomena might be explained by psychological factors like people finding a pattern where there isn’t one, and the influence of the “general plausibility and traditional popularity” idea, most of the research on the subject points out that the frequency of reports makes it hard to ignore, and it deserves further attention and research to find a cohesive explanation.

Whiten Your Teeth From Home for $40 With This Motorized Toothbrush

AquaSonic
AquaSonic

Since many people aren't exactly rushing to see their dentist during the COVID-19 pandemic, it's become more important than ever to find the best at-home products to maintain your oral hygiene. And if you're looking for a high-quality motorized toothbrush, you can take advantage of this deal on the AquaSonic Black Series model, which is currently on sale for 71 percent off.

This smart toothbrush can actually tell you how long to keep the brush in one place to get the most thorough cleaning—and that’s just one of the ways it can remove more plaque than an average toothbrush. The brush also features multiple modes that can whiten teeth, adjust for sensitive teeth, and massage your gums for better blood flow.

As you’d expect from any smart device, modern technology doesn’t stop at functionality. The design of the AquaSonic Black Series is sleek enough to seamlessly fit in with a modern aesthetic, and the charging base is cordless so it’s easy to bring on the go. The current deal even includes a travel case and eight Dupont replacement heads.

Right now, you can find the AquaSonic Black Series toothbrush on sale for just $40.

Price subject to change.

 

AquaSonic Black Series Toothbrush & Travel Case With 8 Dupont Brush Heads - $39.99

See Deal


This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links. If you haven't received your voucher or have a question about your order, contact the Mental Floss shop here.


30 Pungent Facts About Farts

This man is clearly not trying to hide the fact he just passed gas.
This man is clearly not trying to hide the fact he just passed gas.
BrilliantEye/iStock via Getty Images

Whether you openly admit it or desperately try to hide it, it’s an undeniable fact that every living and breathing human being farts. And while passing what you thought was going to be silent gas only to be wrong in certain situations can definitely be embarrassing, there’s something undeniably humorous about flatulence—no matter your age.

If you do love a good fart joke, you’re in good company. The very first recorded joke, which was written by the Sumerians and dates all the way back to 1900 BCE, was about—you guessed it—breaking wind. And some of the world's great thinkers, from William Shakespeare to J.D. Salinger, have slipped a fart joke (or 10) into their work.

In this episode of The List Show, we're sniffing out 30 fascinating facts about farts—from why humans expel gas to how often the average adult squeezes the cheese. You can watch the full episode below.

For more videos like this one, be sure to head here and subscribe.