Why do I wake up at 1 am?

Why do I wake up at 1 am? For those who sleep on time, 1 am is a deep sleep phase and you are completely relaxed. But if you wake up at this hour, it means that you have too much worry in your heart and mind.

For those who sleep on time, 1 am is a deep sleep phase and you are completely relaxed. But if you wake up at this hour, it means that you have too much worry in your heart and mind.