Mask Usage Time

From the perspective of the human physiological structure, because the blood circulation of the nasal mucosa is very strong, the channels in the nasal cavity are very tortuous, and the nose hair constitutes a "barrier" for filtering. When air is drawn into the nostrils, the airflow forms a vortex in the tortuous passage, warming the air drawn into the nasal cavity. 

Some tests have shown that when cold air at minus 7°C is inhaled into the lungs through the nose, the airflow has been heated to 28.8°C, which is very close to the temperature of the human body. If you wear a mask for a long time, the nasal mucosa will become fragile and the original physiological function of the nasal cavity will be lost, so you cannot wear a mask for a long time. 

Masks can only be worn in special environments, such as places with many people and poor ventilation. Of course, when walking in the wild, in order to resist wind, sand, and cold, or in an environment with air pollution, you need to wear a mask, but the time should not be too long. In addition, during the flu season, you should also wear a mask when going to public places where there may be a large number of pathogenic bacteria. Wearing a mask is only one of the ways to prevent respiratory infections, and the most important thing is to maintain good living habits.