Watch: When to change your pillow, Dr Karan Rajan explains in viral video

A doctor's video explaining the importance of changing pillows every two years has gone massively viral on social media.

In the video, Dr Karan Rajan, an NHS surgeon in the UK, explains it's imperative need of changing pillows for a better, healthier lifestyle.

He shares by saying, "The average person sheds about 4kg of skin every year. Most of that ends up on your bed or pillow - a feast for microscopic dust mites."

He adds by saying, "Those dust mites can cause breathing problems and allergy type symptoms."

He even explains what and how yellow spots develop on pillows and how to check whether the pillow is in a condition to use or not.

The video has garnered more than 9k views, and netizens thanked the doctor for sharing vital information.