Shift-work Disorder
Disrupted sleep, drained energy, and a body out of sync.
What is Shift-work Disorder?
Shift Work Disorder occurs when your work schedule conflicts with your body’s natural sleep-wake cycle, known as the circadian rhythm. This internal clock is regulated by light and darkness, priming you to be awake during the day and asleep at night. When you work night shifts, early mornings, or rotating schedules, your body struggles to adjust—leading to chronic sleep disruption and daytime impairment.
Symptoms
People with SWD often experience:
- Insomnia: Difficulty falling asleep or staying asleep during the day
- Excessive sleepiness: Feeling drowsy or fatigued during work hours
- Poor concentration and slower reaction times
- Mood disturbances: Irritability, anxiety, or depression
- Headaches and general lack of energy
- Reduced performance and increased risk of errors or accidents
Causes
SWD is caused by a misalignment between your work schedule and your circadian rhythm. This mismatch prevents the body from getting consistent, restorative sleep. Common triggers include:
- Night shifts
- Rotating shifts
- Early morning shifts
- Extended work hours
- Frequent changes in schedule
All things considered, not everyone who works irregular hours develops SWD, but those who do often struggle to adapt and accumulate sleep debt over time.
If you or someone you know experiences these symptoms, a consultation with a sleep specialist for a sleep study can be the first step toward relief.
