What harm does smog weather do to people's health?

The harm of smog to the body mainly includes the direct stimulation of particulate matter and the role of some harmful substances carried by particulate matter.

The primary hazards of smog are upper respiratory tract infections such as respiratory diseases, respiratory inflammation and sore throat, including lower respiratory tract infections such as bronchitis, chronic bronchitis, pneumonia and bronchiectasis. It will also aggravate cardiovascular and cerebrovascular diseases such as myocardial infarction, heart failure, arrhythmia, atrial fibrillation and other problems, leading to atherosclerosis and ischemia.

In addition, people in foggy days lack sunlight, leading to vitamin D deficiency, which leads to various disease risks. Therefore, it is also harmful to the elderly, pregnant women and children with weak resistance.

Simply put, the human body has an immune response to foreign bodies and has a positive effect on microorganisms such as bacteria, but when it comes to these inhalable particles, it will add fuel to the fire. Because when fine particles enter alveoli, they will stimulate immune cells to swallow them. The problem is that immune cells cannot be excreted after phagocytosis, but with the death of immune cells, a large number of pheromones will be released, and more immune cells will come to help. This increasingly busy situation will lead to inflammation, and long-term chronic inflammatory infiltration may induce alveolar dysfunction (chronic obstructive pulmonary disease) or cancer.

Of course, when very fine particles enter the cardiovascular system, it will also induce cardiovascular inflammatory reaction, thus promoting the occurrence of atherosclerosis.

At the same time, smog particles are a kind of carrier, which can carry heavy metals (for example, one of the mechanisms of smokers' lung cancer is that cigarette smoke is rich in radon, which irradiates the lungs internally), or bring water-soluble components that are not easy to enter the lower respiratory tract (such as sulfur trioxide, which will generate sulfuric acid), thus causing various impacts and hazards.

Generally speaking, smog is the most harmful to the respiratory system and cardiovascular system, but it actually affects many systems of the whole body. Therefore, it is very important to adjust the trip reasonably according to the control amount, wear a mask and use an air purifier.