There are few things more frustrating than lying in your bed, absolutely exhausted, but your mind just won't let you shut off and go to sleep.
There are many different reasons you might experience insomnia, from restless legs to having a lot on your mind. Sometimes you might fall asleep, but wake every few hours, which can be equally frustrating.
According to Dr Maja Schaedel, clinical psychologist in the Sleep Disorder Centre at Guy's Hospital NHS Foundation Trust, having disturbed sleep is very common, Wales Online reports.
