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Spider bites are unpleasant and you’d want to do your best to avoid being bit by a spider. Several things can happen to you when a spider bites you, such as swelling and redness, but never in your wildest dreams would you imagine that a spider bite would make you lose your ability to pee

But that’s exactly what may have happened to a man in Canada. After he got a suspected black widow bite on his foot, he developed a condition called acute urinary retention, which means he couldn’t pee despite having a very full bladder, according to a recent report of this case study.

The 50-year-old encountered the spider while he was walking through tall grass at his cottage in southern Ontario, the report stated. Black widow spiders are very rare in Canada because the arachnids are typically live in warmer places; however, climate change may be driving the spiders farther north.

The man didn’t think much about the bite when it happened. When he felt it, he quickly brushed away what he believed to be a black spider, said lead case report author Dr Matthew Carere, who is an emergency room physician in Victoria, Canada. The man was treated by Dr Carere.

But two hours later, the man felt excruciating pain in his foot. And by the next morning, the pain was unbearable, and he had also developed cramps in his abdomen. He immediately rushed to the emergency room at a local hospital.

“Doctors there thought his abdominal pain was caused by kidney stones and suspected the spider bite was just a coincidental occurrence,” said Dr Carere. The man was eventually sent home.

However, he returned later that day because his abdominal pain had worsened, so doctors sent him to a larger hospital for additional testing.

A range of symptoms

By the time the man arrived at the emergency room where Dr Carere treated him, he was in a lot of pain and sweating heavily, and both of his eyelids were swollen.

His blood pressure was extremely high and a CT scan revealed that his bladder was massively distended, according to the case report.

The man also told doctors about the spider bite, but after carefully examining his skin, they found no evidence of a bite or rash. However, despite the lack of a mark, doctors suspect the man was bitten by a northern black widow spider, a species found in southern Ontario.

The venom from a black widow spider contains a variety of toxins that may have been responsible for the man’s range of symptoms following the bite.

Black widow venom causes a medical syndrome known as ‘latrodectism,’ which can include symptoms such as high blood pressure, heavy sweating and muscle pain, Dr Carere said.

The case was published in July in the Canadian Journal of Emergency Medicine.

The toxins found in the venom contain enzymes that cause a flood of neurotransmitters, which are chemicals that transmit signals from one neuron to the next.

The release of one such neurotransmitter, called acetylcholine, may be one reason why the man developed urinary retention and had difficulty peeing after the spider bite, Dr Carere said.

He also noted that another factor may have been the man’s age. The 50-year-old likely had some sort of underlying benign prostatic hyperplasia, or enlarged prostate.

Dr Carere noted that the doctors can’t definitively prove that the spider bite was the cause of the man’s urinary retention. Indeed, they couldn’t find any previous cases of this happening in the medical literature.

The man was hospitalised for two days so that doctors could insert a catheter to drain urine from his full bladder and get his elevated blood pressure and pain under control. By the time he went home, he was able to pee without any problems.

Source: Live Science

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