What if it's cold and runny nose?

These are the reasons for runny nose when the weather is cold.

With the cold weather, the trivial matter of runny nose began to bother many people again. 50%-90% people have a runny nose as soon as the weather is cold. Eating something and speeding up your steps may cause your nose to sniffle and your nose will flow down unscrupulously. I carry a pile of toilet paper to blow my nose everywhere. It's embarrassing to think about it. People with rhinitis, asthma, eczema or hay fever may better understand this experience. So why doesn't the nose work when it's cold? This may really not blame the nose. When it's cold and runny nose, it's actually the nose that instinctively protects your body.

Inhaled air is too dry, which accelerates liquid secretion.

In a cold environment, the outdoor temperature will drop below freezing point. At this time, the air inhaled through the nose must be treated with damp heat before reaching the lungs, because the sensitive and fragile lungs simply can't bear the impact of cold air. In this process, the nose played a huge role.

When cold and dry air passes through the nose, it will first stimulate the nerves in the nasal cavity and send this signal to the brain. The brain immediately began to deploy dilated blood vessels to increase blood flow to the nose to warm the cold air. At the same time, the nose will be instructed to secrete more liquid to moisten the incoming air. It is estimated that a person may produce 300-400 ml of liquid a day.

Under normal circumstances, these nasal mucus flows to the pharynx along the direction of nasal mucosa cilia movement, and a small part evaporates, and a small part becomes nasal mucus, which generally does not flow out of the nasal cavity.

No matter in the process of heating or humidifying the air, the temperature of the nasal cavity will drop again because of the evaporation of water, so the nose will feed back to the brain and apply for increasing the temperature. The brain will instruct to increase the blood supply and the amount of liquid produced in the nasal cavity again. This process goes on and on, and it is always difficult to achieve balance. If the nose overreacts, it will produce too much liquid, just like a clear stream flowing down the nostrils, which becomes a menacing snot.

It is most important for patients with rhinitis to be careful and warm.

As a patient with rhinitis, asthma, eczema or hay fever, the cells in the nasal cavity are more sensitive, so there will be more radical reactions in this process, so the runny nose will be out of control.

Generally speaking, people without rhinitis usually have a clear nose in winter and a slightly swollen nose. As long as people reach normal body temperature, the situation will get better. If you are a rhinitis patient, as long as you touch cold air a little, your nose will "stop flowing". In this case, you can carry a paper towel or handkerchief with you to deal with the "accident scene", and you can choose anti-allergic or anti-inflammatory spray when it is serious. If it lasts a long time, go to the hospital in time.

In addition, cold air can also irritate eyes and cause tears, but if it is not enough to form tears, the liquid secreted by lacrimal gland will flow from nasolacrimal duct to nose, which also increases the amount of runny nose, which is called "runny nose and tears".

Therefore, in order to prevent embarrassing situations, try to wear a mask when going out in winter, reduce the cold air entering the nasal cavity, pay attention to keep warm, and wash your nose with salt water when you have a runny nose.