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A Rare Condition That Makes People Cry Blood

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Since the 16th century, doctors have reported cases of people who cry blood. Some once considered haemolacria—an extremely rare disorder that causes tears that are partially or entirely made of blood—something akin to stigmata, but doctors now have a bit of a better understanding of why some shed bloody tears. Yet, in many cases it remains a mystery. Here are a few things we know. 

1. Hormone changes can cause bloody tears

In what might be one of the earliest recorded cases of haemolacria, 16th century Italian physician Antonio Brassavola wrote of treating a nun who wept bloody tears when she was menstruating. Then, in 1581, a Flemish doctor wrote of a 16-year-old girl he treated “who discharged her flow throughout the eyes, as drops of bloody tears, instead of through the uterus.” 

Modern science backs this idea up: According to a 1991 study of 125 healthy subjects, menstruation contributes to occult haemolacria, or traces of blood in tears. The paper found that 18 percent of fertile women have some blood in their tears, while only 7 percent of pregnant women, 8 percent of men, and no post-menopausal women show signs of bloody tears. The scientists concluded that "Occult haemolacria in fertile women thus seems to be induced by hormones, whereas haemolacria most often is provoked by local factors (bacterial conjunctivitis, environmental damage, injuries)."

2. Tennessee seems to make people cry blood

Within the past five years, there have been two notable cases of haemolacria: Calvino Inman and Michael Spann. Both live in Tennessee, and doctors have been unable to discover a reason why either weeps blood.

When Inman, who lives in Rockwood, was 15, he stepped out of the shower and noticed red tears covering his face; he thought he was dying. Spann, from Antioch, was walking down the stairs when he experienced a crippling headache and noticed bloody tears.

While suddenly crying bloody tears will understandably cause panic, haemolacria is generally not life threatening. But it can be debilitating: Spann says he has been fired after employers noticed blood running down his face and has since become a recluse

3. Spontaneous cases are rare (but also happen in Tennessee)

Dr. Barrett G. Haik, director of the University of Tennessee's Hamilton Eye Institute, studied cases of unexplained and spontaneous episodes of bloody tears. His report, which was published in 2004 in the journal Ophthalmic Plastic & Reconstructive Surgery, determined that from 1992 to 2003, there were only four cases of spontaneous haemolacria without a medical cause—and two of the known cases that occurred since that study happened in Tennessee. "What's really rare is to have a child like this," Haik told CNN in 2009, when Inman's case first came to light. "Only once every several years do you see someone with no obvious cause."

People living in other places have experienced haemolacria, too. This year, 20-year-old Yaritza Oliva, who lives in Chile, began crying blood, and doctors have ruled out any likely causes, such as conjunctivitis or blood clots. And there are reports that Indian teen Twinkle Dwivedi allegedly cries bloody tears, but many attribute her ailment to Munchausen syndrome.   

4. Haemolacria normally disappears

Almost as unexpectedly as it starts, haemolacria ends. “Most of these were relatively young patients,” Haik’s co-author, James Fleming, an ophthalmologist at the Hamilton Eye Institute, told the Tennessean in 2004. “As they matured, the bleeding decreased, subsided, and then stopped.” 

Spann has experienced bloody tears for seven years, but the frequency has lessened. What was once a daily occurrence now happens about once a week. Haik and Fleming write in the paper: “In all patients, bloody tearing eventually resolved without further sequela. No recurrence has been reported over a follow-up period of 9 months to 11 years.”

5. Injuries also cause haemolacria

In March, a Canadian man was walking on the beach when a poisonous snake bit him, causing him to weep bloody tears and experience painful swelling and kidney failure. Doctors attributed this to the massive amounts of internal bleeding caused by the snake's venom. In most cases of haemolacria, a head injury, tumor, blood clot, a tear in the tear duct, or a common infection, such as conjunctivitis, causes the bloody tears.

When patients cry tears, doctors look for tumors, conjunctivitis, or tears in the tear ducts. Fleming told WTSP that Spann's haemolacria "probably [has] a cause, but it is a small tear duct that is only a millimeter or two or three in diameter. It's a tube. To get into that tube and examine that tube from one end to the other would cause scarring, and you could lose part of the tear duct."

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Why You Might Not Want to Order Tea or Coffee On Your Next Flight
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A cup of tea or coffee at 40,000 feet may sound like a great way to give yourself an extra energy boost during a tiring trip, but it might be healthier to nap away your fatigue—or at least wait until hitting ground to indulge in a caffeine fix. Because, in addition to being tepid and watery, plane brew could be teeming with germs and other harmful life forms, according to Business Insider.

Multiple studies and investigations have taken a closer look at airplane tap water, and the results aren’t pretty—or appetizing. In 2002, The Wall Street Journal conducted a study that looked at water samples taken from 14 different flights from 10 different airlines. Reporters discovered “a long list of microscopic life you don’t want to drink, from Salmonella and Staphylococcus to tiny insect eggs," they wrote.

And they added, "Worse, contamination was the rule, not the exception: Almost all of the bacteria levels were tens, sometimes hundreds, of times above U.S. government limits."

A 2004 study by the U.S. Environmental Protection Agency (EPA) found that water supplies on 15 percent of 327 national and international commercial aircrafts were contaminated to varying degrees [PDF]. This all led up to the 2011 Aircraft Drinking Water Rule, an EPA initiative to make airlines clean up. But in 2013, an NBC investigation found that at least one out of every 10 commercial U.S. airplanes still had issues with water contamination.

Find out how airplane water gets so gross, and why turning water into coffee or tea isn’t enough to kill residual germs by watching Business Insider’s video below.

[h/t Business Insider]

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Scientists May Have Found the Real Cause of Dyslexia—And a Way to Treat It
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Dyslexia is often described as trying to read letters as they jump around the page. Because of its connections to reading difficulties and trouble in school, the condition is often blamed on the brain. But according to a new study published in Proceedings of the Royal Society B, the so-called learning disability may actually start in the eyes.

As The Guardian reports, a team of French scientists say they've discovered a key physiological difference between the eyes of those with dyslexia and those without it. Our eyes have tiny light-receptor cells called rods and cones. The center of a region called the fovea is dominated by cones, which are also responsible for color perception.

Just as most of us have a dominant hand, most have a dominant eye too, which has more neural connections to the brain. The study of 60 people, divided evenly between those with dyslexia and those without, found that in the eyes of non-dyslexic people, the arrangement of the cones is asymmetrical: The dominant eye has a round, cone-free hole, while the other eye has an unevenly shaped hole. However, in people with dyslexia, both eyes have the same round hole. So when they're looking at something in front of them, such as a page in a book, their eyes perceive exact mirror images, which end up fighting for visual domination in the brain. This could explain why it's sometimes impossible for a dyslexic person to distinguish a "b" from a "d" or an "E" from a "3".

These results challenge previous research that connects dyslexia to cognitive abilities. In a study published earlier this year, people with the condition were found to have a harder time remembering musical notes, faces, and spoken words. In light of the new findings, it's unclear whether this is at the root of dyslexia or if growing up with vision-related reading difficulties affects brain plasticity.

If dyslexia does come down to some misarranged light-receptors in the eye, diagnosing the disorder could be as simple as giving an eye exam. The explanation could also make it easy to treat without invasive surgery. In the study, the authors describe using an LED lamp that blinks faster than the human eye can perceive to "cancel out" one of the mirror images perceived by dyslexic readers, leaving only one true image. The volunteers who read with it called it a "magic lamp." The researchers hope to further experiment with it to see see if it's a viable treatment option for the millions of people living with dyslexia.

[h/t The Guardian]

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