How does human snot develop? Is it dirty?

It is very dirty, it is the mucus secreted by the external dust and some harmful substances that you breathe and cause pollution to your upper respiratory tract (such as nasal cavity, lungs).

It contains all kinds of viruses.

Dirty, dirt, dirty, dirty, dirty, dirty, dirty, dirty, dirty, dirty,

Under normal circumstances, the nasal mucosa of the human being secretes mucus all the time to moisten the nasal membrane, moisten the inhaled air, and stick to the dust and fine dust and microorganisms inhaled from the air, which is nasal discharge.

Excessive nasal discharge can cause germs to multiply and invade the body, causing respiratory diseases such as colds and flu.

The mucosa in the nasal cavity is rich in capillaries, and the capillaries are very permeable and can secrete a lot of fluid, and the mucus secreted is nasal discharge. When air passes through the nasal passages, the exhaled air carries dust, particulate matter, germs, etc. Most of them are trapped by mucus and form snot.

First, it is caused by the high sensitivity of the nasal mucosa to certain components in the inhaled air. The symptoms of allergic rhinitis are similar to those of a cold, but they can occur multiple times in a day; When there are no seizures, they are completely normal. The onset of allergic rhinitis is sometimes closely related to the season.

2. The main symptoms of chronic rhinitis are nasal blockage, which is intermittent or alternating in mild cases and persistent in severe cases, with increased nasal discharge. Examination reveals congestion and swelling of the nasal mucosa, a small amount of mucinous discharge from the nasal passages, severe hypertrophic rhinitis due to tissue hyperplasia, uneven mucosal surface, mulberry-like changes in the lower turbinates, and polypoid changes in the middle turbinate mucosa.

3. The symptoms of acute rhinitis are caused by acute infection, which is a common "cold" or "cold" in our daily life, and can have systemic symptoms; It is more common in autumn and winter or winter and spring. The condition usually improves gradually after 7 to 14 days. Those with strong resistance can be cured by themselves.

There is only one reason why a baby has a runny nose:

That is, the baby has a cold.

You know Aiye.

It was hung on the door during the Dragon Boat Festival.

Punch your baby's feet.

Soak that mugwort leaf in water.

Flush your baby's feet with that vapor.

The second is to give the baby more warm water.

Then buy some wind chill cold powder for your baby.

If it is yellow nasal discharge, it is considered to be nasal congestion caused by sinusitis induced after a cold, you can take sinus tablets to make a clear diagnosis, you can put antibiotics on the nose to improve the symptoms, if it is sneezing, runny nose, consider it is caused by allergic rhinitis, this requires anti-allergic**, oral**rhinitis drugs, improve symptoms.

The inner surface of the nasal cavity of healthy people is lined with a complete layer of mucosa, on which there are many goblet cells with secretory function, and there are mucous glands under the mucosa, which usually carry out secretory activities, and the secreted water is used to moisten and inhale air, in addition, the mucus glands often secrete a small amount of mucus, which is evenly distributed on the surface of the mucosa. It is very viscous and can adsorb dust and microorganisms in the air inhaled. Mucus also contains lysozyme, which has the ability to inhibit and dissolve bacteria.

Under normal circumstances, relying on the cleansing effect of this mucus, the inhaled air reaches the back half of the nasal cavity with little to no microorganisms.

Normally, the fluid secreted by the nasal mucus glands and the fluid that is evaporated are in relative equilibrium. Once pathological changes occur in the nasal cavity, the discharge may increase, resulting in the formation of nasal discharge.

Where does snot come from? Why does the snot flow violently when I catch a cold?

After three to five days, the nasal mucosal exudate will accumulate on the surface of the mucosa and form pus-like discharge, and purulent nasal discharge will appear.