Can deja vu be a sign of mental illness or other sickness?

Deja vu, or having the feeling like you have been at a place or experienced a similar scenario before, is not a sign of mental illness and is quite common. Most everyone has experienced it at one time or another. read more

One theory on deja vu is that hyperactive neurotransmitters (e.g., dopamine) that help shuttle information into both short-term memory and long-term memory centers change lanes. The visual memory you are seeing for the first time ends up getting sent directly into long-term memory before it's processed into short-term memory. read more