Insomnia is a common sleeping disorder that can make it difficult to sleep, stay asleep, wake up early, and not fall back asleep. You may feel tired when you wake up. Insomnia can eat your energy level and mood, health, work performance, and quality of life.
How much sleep is enough differs from person to person, but an average person needs about 7-8 hours of sleep a night.
Many people go through acute insomnia, which lasts for several days or weeks. It is usually the result of stress or a traumatic event. But some people suffer long-term (chronic) insomnia that stays for longer than a month. Insomnia may be the main problem, or it may be linked with other health conditions or medications.