Deja Vu: What It Is and Why It Happens

Healthy people can experience this, but it can also be a symptom of a neurological issue.

When pop icon Olivia Rodrigo sang, “Do you get déjà vu?” she was directing the lyric at her ex-boyfriend and his new lookalike girlfriend. While you may not be able to relate to her past paramour’s penchant for identical love interests, this particular line is pretty darn relatable.

An estimated 97% of people have experienced déjà vu at least once in their lives. This condition, which translates in French to “already seen,” is a transitory sensation of having already lived a totally identical situation at some point in the past.

But why does it happen? And is there a medical explanation for it? Neurologist Jean Khoury, MD, delves deeper into this fleeting phenomenon, and what it could mean for your health. Read more