Acute vs. Chronic Insomnia
Insomnia also varies in how long it lasts and how often it occurs.
It can be short-term (acute insomnia) or can last a long time (chronic insomnia).
It can also come and go, with periods of time when a person has no sleep problems.
Acute insomnia can last from one night to a few weeks.
Insomnia is called chronic when a person has insomnia at least three nights a week for a month or longer.