Causes of chronic insomnia include:
- Irregular sleep schedules
- Substances that interfere with sleep (alcohol, caffeine, nicotine)
- Activities that stimulate the brain (playing video games, watching TV) right before bedtime
- For some people, exercising too close to bed time
- Using the bedroom for activities other than sleep and sex
- Depression or anxiety
- Chronic stress
- Pain or discomfort at night
- Poor sleep habits