Why do people get sleepy easily on cloudy days?

1, dark light in rainy days will promote the body to secrete more melatonin. Melatonin can promote people's sleep, and people's eyes will also produce a protein related to sleep. With the emergence of these two, people's drowsiness will be aggravated.

2. After the rain, the negative ions in the air will increase. Negative ions can improve human nervous system and cardiovascular system. , make people feel comfortable, negative ions have sedative and hypnotic effects.

At the same time, when it rains, the air pressure decreases, the oxygen content in the air decreases, the sympathetic nerve activity of people decreases, and it is easy to get sleepy.

3. Another important reason for wanting to sleep in rainy days is white noise. Refers to the sound in which the power of frequency components is uniform in the whole audible range of human ears. White noise can make people feel calm and relaxed, thus improving the quality of sleep.

4. If it is rainy, the dripping rain is light and regular. This situation is also easy to cause brain fatigue, so I want to doze off.

Extended data:

Human drowsiness in rainy days is also related to evolution.

Hiding indoors in rainy days means "safety" and people will relax.

Many human behaviors are related to early evolution. For example, human beings are particularly alert to the rustling in the grass, which stems from their natural fear of snakes; When men choose a spouse, white is beautiful, because women with white skin are younger, which also implies a symbol of high status. Similarly, poor sleep in rainy days may also be related to evolution.

In ancient times, humans generally lived in caves or thatched cottages and were very worried about wild animals when they slept at night.

On rainy days, wild animals generally do not appear, and people will relax their vigilance and gain a short sense of security. After tens of millions of years of evolution, people have followed this habit. Rainy days mean "safety" in their subconscious. People can finally let down their guard in this weather, let nervous nerves relax and dream a lazy and tired dream.

People's Network-Cloudy sleepy