When the weather gets cold, your nose will runny. Where does the runny nose come from?

Under normal circumstances, mucus is the fluid secreted by the nasal mucosa. But in the case of infection, a large number of white blood cell (macrophage) corpses will be mixed in, causing the nasal mucus to become thick and yellow. The BBC's Mysteries of the Human Body explains it this way: When a person is attacked by a virus when he has a cold, the immune system in the human body will respond by releasing macrophages to fight the virus. The way to fight is that macrophages infect themselves and then die. Dead macrophages continue to accumulate. The formation of nasal mucus can be known from the production of nasal mucus. The mucous membrane of the nasal cavity itself will continuously secrete mucus to absorb particles and microorganisms in the air, filter and purify the inhaled air, thereby ensuring that the air entering the lower respiratory tract is clean. When the nasal mucosa is healthy, the secretions are thin and thin, so small that we cannot feel them.

But when there is inflammation in the nasal mucosa, whether it is acute inflammation such as colds and flu, or chronic inflammation such as rhinitis or sinusitis, these inflamed mucosal areas secrete abnormally under the stimulation of inflammatory mediators, often manifesting as Increased secretions. At the same time, depending on the type of infected bacteria and the location of mucosal inflammation, the color of the secretions changes and the viscosity varies. Among them, the larger the mucosal inflammation area, the more secretions will be produced, but the farther the mucosal inflammation area develops into the sinuses, the thicker the secretions will be. Generally speaking, the darker and thicker the secretion, the more serious the inflammation.

To put it simply, a runny nose is the secretion of the inflamed mucous membrane in the nasal cavity. The reason why it never stops flowing is because the mucosal inflammation in the nasal cavity persists. Question: If the runny nose lasts for more than half a month or the nasal discharge contains white gelatinous, yellow gelatinous or sticky, yellow-green viscous substances, it is a typical symptom of rhinitis. If you want to solve the problem of runny nose, you can learn about the enzyme refreshing agent of Xia Shule, which is specially designed to restore the health of mucous membranes. When the mucous membrane in the nose is healthy, there will be no areas of inflamed mucosa, and there will be no runny nose. After recovery, do a good job of daily warmth, nasal care and routine protection to keep the nasal cavity healthy, and you will no longer have the problem of runny nose.