For a more sound sleep is to abandon the use of the smartphone before you go to bed. The fact that bright phone screen in the dark can irritate the areas of the brain to stimulate its activity, and then cause a headache, the Agency said "Prime" medical Director Vladislav Mohamed Ali.

"Before bed people often lies in the dark and looking at a bright screen. Due to the contrast of the light intensity and color temperature influence the transition from the wakeful state into the dream state. Even if we don’t see the bright flashes of the screen, the brain still responds" — the expert explains.

However, many smartphones now have the night reading mode, with which you can change a bright blue-white color of the screen to a warmer tone. This is a great way for fans to "sit" in social networks before bed, and at the same time preserve the sharpness of your vision and do not harm the brain.