Insomnia is the most common sleep complaint. It occurs when you have trouble falling asleep or staying asleep or do not feel refreshed in the morning even though you had the opportunity to get a full night of sleep. Nearly 30 percent of adults complain of insomnia. There are two types of insomnia based on duration:
Acute Insomnia: This type of insomnia lasts for a short time – from several nights up to three weeks – and goes away on its own without treatment. Acute insomnia is more common than chronic insomnia.
Chronic Insomnia: Insomnia that lasts more than three weeks is classified as chronic insomnia. Nearly one in 10 people has chronic insomnia, which often requires some form of treatment to go away.