Add Yahoo as a preferred source to see more of our stories on Google. The effects of using a screen just before going to sleep have been proven in a new study. (Getty Images) (Tero Vesalainen via ...

Huffington Post asked a doctor what's really going on with your sleep ...

You’re tossing and turning, counting sheep for what seems like forever, and still, sleep won’t come. You’re tired but can’t sleep and wonder, Why can’t I sleep? It could be insomnia. In the moment, it ...