Why is it sultry before it rains? What is the reason for feeling chest tightness before it rains?

The weather was fine, but I felt stuffy in my chest. Although the temperature is not that high, it will make people feel very stuffy and even worse than the temperature. The weather is hot and stuffy. This is how many people feel before it rains. Generally speaking, there will be a heavy rain after this. Why do you feel stuffy before it rains? What is the reason for feeling chest tightness before it rains? Let's have a look!

1, high air humidity

Generally speaking, the time when people feel sultry before it rains is mostly in summer. At this time, water evaporates faster, and a large amount of water vapor is gathered in the air, so the air humidity will become very high and the oxygen content will be reduced accordingly. When breathing, they will feel a little difficult and feel chest tightness. One reason why I feel chest tightness before it rains is that the air is too humid.

2, the air pressure is reduced

Changes in atmospheric pressure will affect people's breathing. Before rain, the air humidity is high, which will lead to the decrease of air density and air pressure. The higher the temperature, the more the air pressure drops. People need to adjust the external atmospheric pressure to breathe, and high atmospheric pressure helps air to enter the human body. But when the air pressure becomes low, people's breathing habits will not change and they will feel difficult to breathe.

3, the air is not circulating

If the air humidity is high, but the air circulates, the human body will not feel so stuffy. It is precisely because the wind speed is so small that the steam can't be taken away that it will feel stuffy. Like air humidity, air pressure, wind speed and other factors, there will be a feeling of chest tightness before it rains, and at this time, the ground temperature is high, the sweat of the human body is difficult to volatilize, and it will feel very hot, which is the reason for the sultry before it rains.