“If you are already struggling with sleep, then spending more time in bed will simply lead to more time awake in bed rather than more time asleep,” Reed says. “This leads to more tossing and turning during the night, and more worry, stress and anxiety related to being awake in bed. Over time, this creates an association between the bed, worry, and wakefulness – rather than sleep and relaxation. This makes sleep more difficult.”
Article source: https://www.huffingtonpost.co.uk/entry/harmless-nighttime-habits-that-are-secretly-ruining-your-sleep_uk_62b60188e4b06169caa687d1