How can I tell the difference between sleep deprivation and a sleep disorder?

Sleep deprivation happens when you do not allow enough time for sleep, often because of work, entertainment, an inconsistent schedule, caffeine, or other habits. A sleep disorder interferes with the ability to sleep properly even when enough time is available, and may involve conditions such as sleep apnea, insomnia, or restless legs syndrome. The distinction matters because sleep deprivation may improve with better sleep habits, while a suspected sleep disorder may require monitoring, professional evaluation, and treatment. For people managing diabetes, COPD, heart disease, or another chronic condition, identifying the reason for poor sleep is especially important because ongoing sleep disruption can make symptoms and disease management more difficult.