Although the reason for this is yet unknown, it may be because blue light emits wavelengths similar to daylight, which can deceive our bodies to think that it’s daytime, at any time.

3. It could set your pillow on fire

A good number of cell phone users are so attached to their phones that they sleep with them even under their pillow. The result of this habit has led to recorded incidences of pillows being set ablaze.

The most popular of this incidence is the July 2014 teen from Texas who woke up to a burning smell. Her sheet and mattress have been scorched by her Samsung Galaxy S4, which was under her pillow.

It is, therefore, advisable to shut down the transceiver of your cell phone by keeping it on “airplane mode” while you sleep. Or better still; turn it off because cell phones pump out electromagnetic radiation whenever they’re on.