What may be causing this
- Loss of circadian cues
- Insufficient daytime light and activity
- Long daytime naps
- Nighttime discomfort or bathroom needs
What to try first
- Bright light and activity within an hour of waking
- Keep the person up and engaged during the day
- Limit fluids in the last two hours before bed
- Make nighttime boring: low light, no TV, minimal conversation
What usually makes it worse
- Turning on lights and talking at length overnight
- Daytime sleeping in a recliner
- Late-day caffeine
Simple things you can do today
- Set a fixed wake-up time
- Plan a morning outdoor walk
- Use nightlights along the path to the bathroom
When to call the doctor
- The reversal is new or abrupt
- Nighttime activity is unsafe
- You are exhausted and need respite or a medication review
When it may be an emergency
- Threats or acts of violence toward self or others
- Sudden confusion, weakness, slurred speech, or facial droop
- A fall with head injury, especially on a blood thinner
Medically reviewed. Last reviewed August 2026. This page is educational information, not individualized medical advice.