Insomnia is a common sleep disorder in which you have trouble sleeping or staying asleep, causing you to wake up too early and having trouble getting back to sleep. Insomnia leaves you tired when you wake up.
Insomnia affects your energy level, mood, performance, quality of life and overall health.
This condition can be short-term (acute) or can last a long time (chronic). Acute insomnia lasts for days to weeks. Insomnia is usually caused by stress or stressful events. Chronic insomnia lasts for a month or more. Insomnia can be primary or secondary.
Primary insomnia means your sleep disorder is not associated with any health problem. Secondary means your condition is associated with a health problem.