What does low pressure mean to describe people?

"Low pressure" means that the mood is relatively depressed and oppressive, similar to the feeling of "unhappy mood".

In a low-pressure environment, the partial pressure of oxygen in inspiratory air is lower than normal pressure, which reduces the partial pressure of oxygen in alveolar air, the pressure difference between the partial pressure of oxygen in alveoli and the partial pressure of oxygen in blood, and the oxygen diffused from alveoli to capillaries in unit time is reduced, which leads to the decrease of the partial pressure of oxygen in arteries and the decrease of oxygen saturation. This in turn leads to a decrease in the pressure difference between blood and oxygen in the tissue, so that the amount of oxygen diffused from blood to the tissue is reduced, and hypoxia occurs due to insufficient oxygen supply in the tissue. Sudden severe hypoxia can lead to coma, mild mountain maladjustment and mountain sickness. There is no oxygen, so it's stuffy.

According to the degree of low air pressure, it can be divided into three situations:

1. If it is mild depression, people don't feel much, on the contrary, they will feel more comfortable. (Under the standard of 1) For example, people living on the plateau will be more difficult and the seaside will be more comfortable.

2. If it is moderately low pressure, people will feel uncomfortable, and the internal pressure of the body will increase (relative to the external pressure), and there will be mild edema and poor blood circulation.

3. If it is severely depressed, people will die because of high internal pressure. Reflected in eyeball, visceral protrusion, blood vessel rupture, etc.

In addition: as for blood, when the atmospheric pressure is lower than 600Pa and the boiling temperature of blood is lower than 36, then human blood will boil, and before that, human beings have suffocated and died.

References:

Baidu encyclopedia (what does low-pressure people mean)