What is insomnia?
Insomnia is a sleep disorder in which you have trouble falling and/or staying asleep.
The condition can be short-term (acute) or can last a long time (chronic). It may also come and go.
Acute insomnia lasts from 1 night to a few weeks. Insomnia is chronic when it happens at least 3 nights a week for 3 months or more.
Causes
Not only those related to big life events, like a job loss or change, the death of a loved one, but also from smaller things like an exam the other day
Things around you like noise, light, or temperature
Changes to your sleep schedule like jet lag, a new shift at work, or bad habits you picked up when you had other sleep problems