Causes of acute insomnia can include:
- Significant life stress (job loss or change, death of a loved one, divorce, moving)
- Illness
- Emotional or physical discomfort
- Environmental factors like noise, light, or extreme temperatures (hot or cold) that interfere with sleep
- Some medications (for example those used to treat colds, allergies, depression, high blood pressure, and asthma) may interfere with sleep
- Interferences in normal sleep schedule (jet lag or switching from a day to night shift, for example)