Insomnia is difficulty getting to sleep or staying asleep for long enough to feel refreshed the next morning, even though you’ve had enough opportunity to sleep.
Most people experience problems sleeping at some point in their life. It’s thought that a third of people in the UK have episodes of insomnia. It tends to be more common in women and more likely to occur with age.
It’s difficult to define what normal sleep is because everyone is different. Your age, lifestyle, environment and diet all play a part in influencing the amount of sleep you need. Many things influence the amount of sleep you need, including your age, lifestyle, diet and environment.
Most healthy adults sleep for about seven to nine hours a night. As you get older, it becomes more difficult to maintain that amount, even though you still need it.