Insomnia is a disorder characterized by difficulty falling and/or staying asleep. People with insomnia can have one or all of the following symptoms:
- Trouble falling asleep.
- Waking up often during the night and having difficulty getting back to sleep.
- Arising too early in the morning.
- Feeling tired upon awakening.
- Lapses in memory or concentration.
Types of insomnia are primary insomnia, which is a condition that is not directly associated with any other health issue or problem; and secondary insomnia, which is a condition related to an illness or ailment, medications or substance use.
Acute insomnia is a short-term problem that can last from one night to a couple of weeks.
Causes include a significant amount of stress, emotional or physical discomfort, environmental factors, some medications and disruption of sleep schedules.
Insomnia is considered chronic when a person has difficulty sleeping for a minimum of three nights a week for a month or longer. Causes include depression, anxiety, chronic stress and pain or discomfort at night.