Insomnia is difficulty getting to sleep or staying asleep, or having non-refreshing sleep for at least 1 month.

Primary insomnia refers to insomnia that is not caused by any known physical or mental condition. Insomnia is caused by many different things. The most common causes of insomnia are:

• Alcohol
• Anxiety
• Coffee
• Stress

Secondary insomnia is caused by a medical condition. Depression is a very common cause of secondary insomnia. Often, insomnia is the symptom that causes people with depression to seek medical help.

Symptoms include:

• Difficulty falling asleep on most nights
• Feeling tired during the day or falling asleep during the day
• Not feeling refreshed when you wake up
• Waking up several times during sleep

People who have primary insomnia tend to keep thinking about getting enough sleep. The more they try to sleep, the greater their sense of frustration and distress, and the more difficult sleep becomes.

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