What Is Deja Vu and Why Do We Experience It?

It Could Be A Sign Of Epilepsy

While a little déjà vu now and then is very common, getting it a lot can be a signal that something's awry. "Déjà vu is commonly reported by patients with epilepsy," Hafeez tells Bustle. For people with the disorder, déjà vu can be caused by focal seizures, which occur in small parts of the brain and can induce disorienting feelings and experiences, like tasting something that isn't in your mouth. "If it happens increasingly or is accompanied by other symptoms such as abnormal visual experiences, or problems with your vision, or motor operations like mouth or facial movements you can inquire about your experience with your doctor," Hafeez says.