Tiktokers find old razor blades behind bathroom mirrors

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These relics of the past are coming back to haunt Gen Z.

Disturbed TikTok users are sharing videos of themselves finding rusty old razor blades behind their bathroom mirrors.

The discoveries are a result of small slots found in medicine cabinets seen in homes built before the 1970s. Cheap and disposable razors were most commonly used before consumers switched to plastic. The slots were meant for people to get rid of the used razor blade.

The openings led to a pit in the wall where the blades would stack up behind the mirror.

One TikToker, named Carly Knight, posted about her findings when she saw the old razor blade slot in her home.

In one of her TikTok videos, Knight took viewers on a tour of her 1950s-style home. One commenter suggested that she may have a razor hole in her bathroom. She then showed users that in her medicine cabinet, there was a small opening labeled "Used razor blade disposal."

anybody else's house have this? 👀 #fyp #greenscreen #MyCostume #exprESSIEyourself

More than 150 people have used Knight's sound clip on TikTok to share their own home discoveries. One user, @noah_quay, even showed that he removed the medicine cabinet to unveil dozens of vintage used razors.

Reply to @chaseconnelly part 2!! #razor #oldhouse #fyp

In 1903, Gillette introduced the first safety razor into the market to give men an easier and more convenient option to shave.

The new product was a safer buy than using the straight-edge razors used at barbershops at the turn of the 20th century. Gillette's new product was seen as a big improvement at the time — though efforts to reduce waste have swung the pendulum back toward reusable razors.

Discoveries like Knight's are just the latest TikTok trend to captivate history buffs. Other videos have gone viral unveiling hidden relics, from secret bathrooms to creepy concealed rooms.

In March, New York City renter Samantha Hartsoe shared that she felt a cool draft from behind her bathroom mirror. Intrigued, she decided to take down the mirror to investigate the breeze, and found a gaping hole leading into a mysteriously empty room.

"Seriously never would I have expected to find this … and I documented all of it," Hartsoe wrote in a caption for the first clip.

In a four-part series on Hartsoe's TikTok channel, she is seen gearing up with a face mask and head lamp for an expedition into the dilapidated space — bringing a hammer with her for protection. When a friend, heard in the background of one video, tells Hartsoe she's "holding it wrong," she retorts, "Is there a wrong way to hold a hammer to kill somebody? No."

Thankfully, the hammer wasn't needed on this occasion; Hartsoe made it out of the apparently deserted adjacent apartment alive and unscathed.