Insomnia is defined as difficulty getting to sleep or staying asleep for long enough to feel refreshed the next morning.

Most of us will have experienced a disrupted sleep and will know how it feels when you can’t seem to fall asleep. It may be that you are thinking about the next day or have had a coffee too near to bedtime. Perhaps you found it easy to fall asleep, but continue to wake up through the night. Either way, a rough sleep can leave you feeling drained and irritable the next day. Those who suffer with insomnia will experience these feelings regularly.