Bacteria love the warmth of their nasal cavities.

The nasal cavity, as the first line of defence for the human respiratory system, is a warm and wet environment, which also attracts the “likes” of many bacteria. The temperature of the nasal cavity is kept in a relatively stable and appropriate range, approximately 32°C-34°C, which is an ideal survival temperature for bacteria. As we humans like to live in comfortable indoor environments, bacteria are better able to metabolize and breed in such warm environments. Furthermore, mucous membranes of the nasal cavity can be transmitted to mucous fluids that not only humidly inhaled the air and prevented the nasal cavity from drying, but also provide rich nutrients for bacteria. In our daily breathing, a lot of microbes enter the nasal cavity with the air. Some of these bacteria, such as yellow and yellow fungus, and skin fungus, find a suitable “nurse” within the nasal cavity. Under normal circumstances, a good fungus in the nasal cavity and the immune system of the human body can maintain a state of equilibrium and inhibit the excessive growth of harmful bacteria. For example, prophylactic bacteria, such as bacterium in the nasal cavity, can prevent the proliferation of harmful bacteria in the nasal cavity by, inter alia, competing for nutrients and producing antibacterials. However, this balance is broken when human immunity declines. For example, the immune system of the human body is less functional and unable to effectively control the growth of bacteria after excessive fatigue, lack of sleep, malnutrition or exposure to major diseases. At this point, those bacteria that are otherwise suppressed will seize the opportunity to breed in large quantities, causing a nasal cavity infection. Common nasal infections, such as nasal inflammation, overproduction of bacteria can lead to swollen, swollen nasal mucular membranes, high levels of secretions, and disorders such as nasal plugs, sneezes, etc. In addition, environmental factors can have an impact on the bacterial survival in the nasal cavity. In cold, dry winters, the blood circulation of nasal mucous membranes can be somewhat affected and their resistance to bacteria reduced. Moreover, dry air makes the mucous glucose of the nasal mucous membranes sticky, which discourages normal movement of the mucous fibre, making it easier for bacteria to stay and reproduce within their nasal cavities. On the contrary, in a warm and humid environment, the comforts of the nasal cavity, while high, also provide more favourable conditions for bacteria to breed. Bacteriological infection is more likely to occur in such environments for a long period of time, without attention to nasal cavity. At the same time, some bad living habits make it easier for bacteria to “spoil” within their nasal cavities. For example, the hands are often used to dig nostrils, and the various bacteria carried on their hands are brought directly into the nasal cavity, disrupting the balance of the fungus in the nasal cavity and increasing the risk of infection. Furthermore, the exposure of the nasal mucous membrane to external force irritation, which also provides an entry point for bacteria to enter, is vulnerable to minor damage. In order to prevent disease from being caused by the overproduction of bacteria in the nasal cavity, we should maintain good living habits and nasal cavity. (c) Take care to rest and ensure adequate sleep and a reasonable diet to enhance the body ‘ s immunity. In everyday life, exposure to harmful chemical substances and allergies is minimized, and stimuli to nasal mucous membranes are reduced. At the same time, saline water can be used to regularly wash the nasal cavity, keeping the nasal cavity clean and wet, which helps to remove bacteria and allergens within the nasal cavity and to maintain the healthy environment of the nasal cavity.