It's easy to get sleepy on rainy days. Why does the weather change our mental state?

We all know that we feel sleepy when it rains, so why does the weather change our mental state? There are actually several reasons. In fact, we all know that on rainy days, we will hear some rain sounds, and these small sounds will change our mental state. In other words, listening to these small sounds, especially when we hear some very weak sounds, it is easy to get sleepy. For example, someone whispering in his ear may cause fatigue.

In other words, if it rains outside, the sound of rain will play a small role and change people's mental state, which means that people will be sleepy at this time, so everyone will doze off on rainy days. We all know that there is no sun on cloudy days and rainy days. It is precisely because the dark clouds cover the sun that little sunlight shines on the ground. Of course, when people are in the dark, they will secrete a lot of melatonin, which can make people very relaxed.

In other words, it is very easy for people to feel sleepy when they are relaxed. I think this is normal, too. For example, at night, we are much more sleepy than during the day, especially on rainy days. During the day and at night, it is easy to get sleepy in rainy days. On rainy days, we all know that the humidity in the air is high. In fact, this will lead to a sharp rise in the content of negative oxygen ions in the air. After a sharp rise, it will actually affect our psychological system, and our psychological system will be affected. Naturally, our mental state will change and we will become sleepy. As we all know, when it rains, people's spirits are abnormal. In fact, there are also great reasons.

In fact, we all know that in rainy days, we can't receive sunshine and feel confident. That is to say, people will cheer themselves up when they receive sunshine, but in rainy days, they will affect their mood and change their state. ?