Once I went to bed at 10:30, I was already very sleepy, but I was unwilling to close my eyes and continue to look at TikTok. After watching for 1 hour, I was completely drowsy, and then when I turned off my mobile phone and prepared to go to bed, I couldn't sleep at all. The brain is abnormally active, and finally around 2 a.m. it is confused and asleep, and it cannot get up in the morning, and people have no energy all day.

It feels like people's drowsiness has a time period, and after that period of time, it is very difficult to fall asleep. Why can't we sleep at night? It could really just be late at night, it's that simple.