Where does snot come from and where does snot come from?

Moistened with the inhaled air, the nasal mucosa normally has a small amount of mucus secretion, but it does not flow out of the nasal cavity, and there is no abnormal odor. When there is inflammation in the nasal cavity, secretion increases. The nature of nasal discharge can often be used to distinguish various inflammations, such as mucous or purulent nasal discharge, scab-like nasal discharge with foul odor, watery nasal discharge with large amounts, unilateral blood discharge with nasal congestion, etc., which should be differentiated in detail according to the patient's age, medical history, and accompanying symptoms.

Symptoms Possible conditions.

Discharge a large amount of serous watery fluid with cold symptoms Acute rhinitis is a cold.

Profuse, watery nasal discharge, accompanied by nasal itching, continuous sneezing, etc., tends to come on suddenly and stop quickly. Allergic rhinitis.

Mucous or mucopurulent nasal discharge, which is very large, often flows into the pharynx and is coughed up through the mouth, with alternating and intermittent nasal congestion. Chronic pure rhinitis.

Fishy, foul-smelling nasal discharge, often forming a yellow-green dry scab that is not easy to blow out. Atrophic rhinitis.

Early efflux is similar to acute rhinitis, but quickly becomes mucopurulent or purulent, and usually occurs in the affected nasal cavity. It is accompanied by fever, headache and local swelling and pain, and the sinuses are obviously tender and even red and swollen. Acute sinusitis.

Mucus and pus flow from the nasal cavity on the affected side for a long time, and it often flows into the pharynx and feels more "phlegm", and the sense of smell is often reduced. Chronic sinusitis.

It is more common in patients over 40 years of age, with recurrent unilateral mucopurulent bloody nasal discharge, i.e., bloody foul-pustuated nasal discharge. Malignant tumors of the nasal cavity and sinuses.

It is more common in children, with a history of foreign body insertion, and usually one-sided rancid or bloody foul-purulent nasal discharge, accompanied by nasal congestion. Nasal foreign bodies.

In addition, in the prodromal phase of infectious diseases such as measles, scarlet fever, and whooping cough, cold-like symptoms may occur, which can cause runny nose, and attention should be paid to their exposure history and other special manifestations (see related pages). Nasal diphtheria is often mucopurulent and mixed with blood, occurs in children, has a very low incidence and can be found to be covered with a grayish-white pseudomembrane on the nasal mucosa.

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.

Diseases invade the respiratory system.

Nasal mucus is a fluid secreted by the nasal mucosa, nasal mucus is a simple substance composed mainly of water, glycoproteins, and inorganic salts suspended on it.

When you have a cold, you will have a runny nose, and when you are healthy, normal people secrete about hundreds of milliliters of nasal mucus every day, which is equivalent to the amount of a coke, which flows to the posterior nostrils of the nose and enters the pharynx, and returns to the body.

Nasal mucus is nutritious and warm to bacteria, and it is parasitic when you are sick, and the nasal mucus with bacteria is yellow or green.

The specific substance is not clear, but I know that nasal discharge is composed of substances and germs in the body, runny nose is to bring germs out of the body, when you have a cold, you can have a runny nose, it means that you have a good physique, and generally do not fall ill. It's basically troublesome to not have a runny nose, exercise more, drink plenty of water (resolutely not a drink), and don't stay up late. The problem of nasal discharge was solved in a few days.