Insomnia

Insomnia is a common sleep disorder that can make it hard to fall asleep, hard to stay asleep, or cause you to wake up too early and not be able to get back to sleep. You may still feel tired when you wake up.

What is the main cause of insomnia?

It's not always clear what triggers insomnia, but it's often associated with: stress and anxiety. a poor sleeping environment – such as an uncomfortable bed, or a bedroom that's too light, noisy, hot or cold. lifestyle factors – such as jet lag, shift work, or drinking alcohol or caffeine before going to bed.