If the last thing you do before going to sleep is play with your mobile phone, you might need to change that habit. According to a study sponsored by Mobile Manufacturers Forum, radiation emitted by mobile phones can cause headaches and damage sleep.

Even if this is not a serious as other potential health risks associated with mobile phones such as cancer, it is still disturbing given that many kids love to play with their cellphones at night. According to Telegraph:

The study indicates that during laboratory exposure to 884 MHz wireless signals, components of sleep, believed to be important for recovery from daily wear and tear, are adversely affected.

Moreover, participants that otherwise have no self-reported symptoms related to mobile phone use appear to have more headaches during actual radio frequency exposure.

The sample size of the study is very small - 35 men and 36 women. Still, you may want to check again the most radiation-intensive mobile phones in the market so you can minimize future headaches.