Our body clock is set by light and expects sleep at night; shift work pushes against it.
When insomnia or sleepiness persists because of the work schedule, it is called shift work disorder.
Key concepts
- Light timing is the strongest tool for shifting the clock
- An anchor sleep block on both work and off days helps
- Drowsy driving after night shifts is a real danger
Symptoms and signs
- Short, broken daytime sleep
- Severe sleepiness during the shift
- Irritability, poor concentration, acidity
Causes
- Working against the natural body clock
- Daylight and household noise during daytime sleep
- Rapidly rotating schedules
Risk factors
- Permanent night shifts or backward rotation
- Long commutes
- Caring for small children during the day
Evidence-based management
- Dark, cool room with eye mask and earplugs for day sleep
- Wear dark glasses on the way home after a night shift
- Short planned nap before the shift; caffeine only early in the shift
- Rotate shifts forward (morning → evening → night) when possible
When to seek professional help
- Daytime sleepiness affecting work, study or driving
- Near-misses or dozing while driving
- Low mood or anxiety building up
Frequently asked questions
Can I ever fully adapt to night shifts?
Most people adapt only partly. Good light control and a fixed routine reduce the strain.
Are sleeping pills a good solution?
Only short-term and under medical advice; behavioural steps are safer and longer lasting.
Medical references
Guidelines and official sources used for this article.
- Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. Journal of Clinical Sleep Medicine, 2021.
- ICD-11 for Mortality and Morbidity Statistics. World Health Organization.
- Author
- Dr. Kuldeep Budania, MBBS, MD Psychiatry
- Medical reviewer
- Dr. Kuldeep Budania, MD Psychiatry
- Last reviewed
This article is for general information and is not a substitute for personal medical advice.
Related articles
Related guides
Need personal advice? Book a confidential consultation.