NHS doctor explains what happens when you daydream and turn on 'screensaver mode'

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Dr Karan Rajan, who boasts 4.9million followers on TikTok, answered to his viewers' strangest quests on the app and tried to explain it in layman's terms.It is completely common when you find yourself zone out in certain situations and your mind goes blank - which undoubtedly gives you a "feel good" feeling.READ MORE: Doctor proves 'everything you see is upside down' with mind-blowing trickThe expert made a video and explained what it can do to the brain when it happens."You've heard of the fight or flight response but they are actually a third of survival instinct freeze," he said."For example you are in a stressful meeting so you can't exactly flee from that stresser but you can freeze and enter that fuzzy, blank, mental state."The fight/flight/freeze response dictated by the amygdala - a structure involved in emotion and survival but nothing to do with thought or consciousness - deep in the brain."Dr Karan said the "zone out" feeling is part of the process to help you conserve energy resources just like "slowing down the heart rate or breathing rate".Want all the biggest Lifestyle news straight to your inbox?

Sign up for our free Daily Star Hot Topics newsletter"It's our body response to partially shut the body down, it's a natural response to stress.

Basically, your screensaver mode," he continued, adding that other factors that are considered "stressful" can also trigger the "screensaver mode".His fans shared their thoughts in the comment after watching the video.One said: "Wondered what this was.

Didn’t think it was a stress response. Always called it the 'comfortable stare'."A second wrote: "I've always been called a 'daydreamer' as I zone out on a regular basis."READ NEXT:Tattooed dad with 95% of body inked wows.