Epilepsy is the most common of neurological conditions to be associated with déjà vu, as it affects the temporal lobe of your brain, where vision is interpreted. There are several types of seizures, but it is simple partial seizures, also known as focal onset aware seizures, that are most often associated with deja vu experiences.3
For most healthy individuals, déjà vu has no serious impact, other than a bit of a feeling of confusion momentarily. However, if you are experiencing frequent déjà vu (a few times a week or more), you may want to visit a neurologist to be evaluated for epilepsy or any other neurological conditions.