Dark therapy is when you try to sleep in a room that is really, really dark. It might seem scary at first, but it can actually help you sleep better. When it's dark, your brain makes a naturally occurring hormone called melatonin, which helps you feel sleepy.
But sometimes during the day, we are exposed to a lot of light, especially from screens like phones and computers. This can make it hard for our brains to make melatonin when it's time to go to bed. That's why sometimes doctors might recommend dark therapy.
It means that you try to create an environment that mimics nighttime by making the room as dark as possible. You could use curtains or blinds to block out any lights that might be coming in, and you could try turning off any screens or electronics that might be making light.
It might take some getting used to at first, but over time, your body could adjust and you might find that you sleep better and feel more rested in the morning!