Why do you often dream of taking classes at school many years after graduation?

Many things have no reason. Existence is reasonable.

The root of dreams is actually the activity of the brain. We know that the human brain can constantly respond to external stimuli when it is awake. In the evening, when people are tired, they go to bed. During most of sleep, brain waves and eye movements are the same as when waking up, and only the body muscles are in a state of inhibition. At this time, what we experienced, saw or thought during the day will reappear in our dreams.

The content of dreaming is often related to the stimulation during the day or during sleep. If you think too much about something during the day, you will dream about it at night, or even if you have never thought about someone or something, because you have experienced it before, some brain cells will "recall" the past when you sleep at night, so you will dream about it.

When sleeping, external stimuli will make the brain react incorrectly, resulting in all kinds of weird dreams. In addition, the stimulation and pathological changes of various organs in the body will also cause similar scenes in dreams. For example, if you are in a hurry, you will dream that you can't find the toilet anywhere.

Dreaming is a physiological phenomenon. Normal dreaming will not affect your health, but if you often have nightmares or strange dreams that affect your sleep, you should see a doctor and treat them in time. After people fall asleep, a small number of brain cells are still active, which is the basis of dreaming.

Because the dream itself is difficult to describe and ponder, the artistic conception of the dream can only be clear to the parties concerned, and outsiders are just bystanders. If it affects your normal life, I think you should see a psychologist or Duke Zhou. It may be because of work pressure, or it may be other reasons. But I wish you can get out of this strange dream as soon as possible and live a good life! Hmm. How interesting