A doctor has amazed social media users this week by revealing how and why the phenomenon of deja vu exists in a new video.

The footage in question was uploaded to TikTok by Dr. Karan Raj; an NHS doctor who routinely takes to social media to explain all manners of health and psychological issues, such as sleep paralysis and false memories, to his 3 million followers.

[[tiktokwidget||https://www.tiktok.com/@dr.karanr/video/6910700180610256130]]

In this latest video, Dr. Raj broke down the phenomenon of Deja Vu – in which seemingly-mundane events feel strangely and unexplainably familiar, stating:

"What is déjà vu? It's basically a glitch in your brain. It's when a new short-term memory gets accidentally stored in the long-term memory.

"So it feels like it's happened before because our brain is telling us it's an old memory. It's just sloppy admin by your brain."

The doctor's explanation clearly resonated with other TikTok users, and the video currently boasts over 825,000 views and more than 2,700 comments as of the time of writing.

Doctor explains why we get deja vu and it's sending the Internet into meltdown