The Most Horrifying Things Found Living Inside People

It's not what's on the outside you should be worried about. It's what may or may not be secretly living inside you that should keep you up at night. The creepy crawlers on this list of terrifying things found living inside humans will give you nightmares for weeks. Some entered these humans through food, while others dropped their eggs right on an unsuspecting host's head. However they got there, they will all make your skin crawl.

Here is a list of the creepiest non-human invaders that could end up living inside you, sometimes without your knowledge. This list of horrifying things found living inside people includes insects, other bugs, worms, sperm, fis-- wait, what? Sperm?

Yes. Sperm. Squid sperm to be specific. Click through the list below to find out what kinds of creepy creatures have been found living inside humans, and could one day end up inside you.

  • This Man Had A Parasitic Twin Living Inside Him

    While the thought of creepie-crawlies and other bugs inside of you are enough to make you squirm, the idea that an entire person can be living inside of you takes the notion of a parasite to a disturbing new level.

    Sanju Bhagat's stomach was once so swollen and hard it appeared that he was in his third trimester of pregnancy. He had always had a big belly, but simply thought that was how he was built. However, one night in June 1999, whatever was in his stomach was pressing up against his diaphragm and he couldn't breathe. He was rushed to the hospital and what doctors found is nothing sort of shocking. 

    Dr. Ajay Mehta believed it was a tumor, but when he cut open Bhagat's stomach, he found a half-formed human creature, still technically living

    "He just put his hand inside and he said there are a lot of bones inside," Mehta said. "First, one limb came out, then another limb came out. Then some part of genitalia, then some part of hair, some limbs, jaws, limbs, hair."

    Turns out, Bhagat was housing his half-formed twin brother in his stomach since he was born. He had one of the world's most insane medical conditions - fetus in fetu, a rare abnormality that occurs when a fetus gets trapped inside of a twin. Bhagat's twin was alive (in its own way) and had been acting as a parasite to Bhagat for 30 years. 

  • A Woman's Mouth Was Impregnated By Squid Sperm

    Many people have hang-ups about eating "raw" seafood. Whether for health reasons or some other aversion, to each his or her own. But one 63 year-old woman got something else disgusting when she ate some partially cooked squid in South Korea in June 2012. As she bit into a part of the delicious dish - which still had its organs intact - she felt a "pricking and foreign-body sensation" in her mouth. She spat it out.

    But she was too late. Pods of squid semen had already shot into her mouth, impregnating the mucous membranes of her tongue, cheek, and gums. Doctors later removed the "twelve small, white spindle-shaped, bug-like organisms" called spermatophores and also identified a sperm sack. They didn't have eyes or little baby tentacles or anything, but still, the products of animal sperm were living inside her mouth.

    This wasn't the first case of this happening, either. In December 2011, another poor sap got this report from the doctor: The sperm bags of the squid had thrust into the squamous epithelium (inner lining) of the patient's hard palate (roof of the mouth). The remaining part of the raw squid consisted of the testis and the sperm bags.

  • A Live Snail Was In A Four-Year-Old's Knee

    During a family vacation in July 2013, four-year-old Paul Franklin tripped and skinned his right knee at the beach. The family didn't think much of the scrape and cleaned it out and popped a band-aid on it. Cut to a few weeks later, and the knee was incredibly infected. 

    Doctors believed it was a staph infection and treated it with antibiotics. While it helped with the oozing of the knee, there was still a growing black bump underneath Paul's skin. Fed up, Paul's mom decided to squeeze the growth and out popped a sea snail. Paul opted to keep the sea snail and named him Turbo. 

  • A Spider Burrowed Its Way Into An Australian Man's Stomach

    On a 2014 trip to Bali, Dylan Maxwell experienced the surreal. A spider had made its way into Maxwell's stomach via an old appendix scar on his stomach. It traveled from his stomach up his torso, leaving a strange red line as a trail on Maxwell's body. It reached all the way up to his chest. Three days later, he had the spider removed. 

  • Doctors Found A Cockroach Living In Woman's Skull

    In a true nightmare-come-to-life, doctors in India discovered a living cockroach in a woman's skull after she complained of a "crawling sensation" inside her head. According to news reports, the cockroach entered the woman's nose as she slept and bore a path underneath her skin up to her skull.

    The woman said she could feel a weird burning sensation and had to wait until the morning to go see the doctor. The cockroach was alive and "didn't want to come out," according to the doctors. 

  • A Botfly Laid Eggs In A Five-Year-Old's Eyeball

    There are few things worse than getting something in your eye. On the bright side, the temporary blindness is usually easy to alleviate. Simply remove the eyelash, piece of glitter, speck of dust, whatever, and go on about your day. For one 5 year-old boy in Honduras, however, the solution was a bit more complicated (and expensive). That's because the thing in his eye was a Human Botfly. Do yourself a favor and never, ever Google "botfly." And for the love of kittens, do NOT then click "Images."

    These little buggers are very selfish. The lady botfly lays her eggs on the outside of another living creature (like a mosquito) that will drop them onto bigger animals so that when the eggs hatch, the larvae can squirm inside the host to brew. Some species of botfly prefer to burrow inside warm-blooded animals, like squirrels, horses, and human people.

    A visit from a botfly parasite is usually not that hard to fix - a simple surgical procedure will do the trick. But the larva living inside the Honduran boy's face was both "late-stage" and camped out in his anterior orbit. That meant the surgery required a Buñuel-style incision on the old conjunctiva.