What Is Shift Work Disorder, and How Does It Develop?

Shift work disorder, also known as shift work sleep disorder, is a condition that primarily affects individuals who work night, early morning, or rotating shifts. Extended periods of working during nighttime hours can lead to the development of this disorder. Symptoms include insomnia, excessive sleepiness during work hours, and significant sleep loss, with affected individuals typically experiencing a reduction in sleep duration by one to four hours per night.