Significant life stress (job loss or change, death of a loved one, divorce, moving)IllnessEmotional or physical discomfortEnvironmental factors like noise, light, or extreme temperatures (hot or cold) that interfere with sleepSome medications (for example those used to treat colds, allergies, depression, high blood pressure, and asthma) may interfere with sleepInterferences in normal sleep schedule (jet lag or switching from a day to night shift, for example)
Causes of chronic insomnia include:
Depression and/or anxietyChronic stressPain or discomfort at night