ELI5: Explain Like I'm 5

Delayed sleep phase disorder

Delayed sleep phase disorder is when your body's internal clock, also known as your circadian rhythm, is not in sync with the typical sleep schedule of most people. This means that you have a hard time falling asleep and waking up at the same time as those around you.

Think about your favorite TV show - let's say it starts at 7pm. Most people watch it then and go to bed at around 9 or 10pm. However, if you have delayed sleep phase disorder, your body might not think it's time to go to sleep until midnight or even later. And if you have to wake up for school or work at 6 or 7am, your body might feel like it needs more sleep, even if you've had a full 8 hours.

It's important to note that delayed sleep phase disorder isn't just being a "night owl" or choosing to stay up late - it's a real sleep disorder that can affect your quality of life.

Luckily, there are ways to manage delayed sleep phase disorder. One way is by keeping a consistent sleep schedule, even on weekends or days off. This means setting a regular bedtime and wake-up time and sticking to it as much as possible. Another way is by avoiding bright lights (like from phone screens, TVs, or computer monitors) for at least an hour before bed. This can help your body produce melatonin, which is a hormone that helps regulate your sleep-wake cycle.

In some cases, doctors may recommend other treatments, like light therapy or even medication. But for many people, just making simple adjustments to their sleep routine can make a big difference in managing delayed sleep phase disorder.