Is Green Snot Dangerous? What the Color of Your Snot Says About Your Health

The main component of nasal mucus is water. It's also combined with proteins, sodium, and cells, and serves to keep the nasal passages moist. When suffering from rhinitis or a cold, the nasal mucosa secretes large amounts of mucus to expel pathogens and allergens. While usually clear, the amount, viscosity, and color can vary depending on the underlying condition.

 

◇Yellow nasal mucus

 

Yellow mucus indicates that the immune system is actively fighting an infection. White blood cells sent to attack the infectious agent die and release enzymes that give the mucus a yellow color. This is a symptom of a virus that invades the body, such as a cold, the flu, or respiratory syncytial virus (RSV).

◇Green snot

 

Green mucus appears when the immune response is heightened. The green color is due to an enzyme called myeloperoxidase, which is produced by neutrophils, a type of white blood cell. This enzyme produces specific molecules that destroy pathogens. While it most often appears in response to bacterial infections, it can also occur when a strong immune response is launched against an aggressive virus.

 

◇Red and pink

 

This means there's blood in the mucus. This occurs when the nasal tissues are irritated or damaged. For example, excessive nose blowing or picking your nose when the nasal mucosa is dry can cause damage to the internal tissues. If a small amount of blood stops quickly, there's no need to worry. The same goes for brown or orange nasal discharge.

 

◇Black

 

Black mucus can indicate a serious problem, unless it's caused by prolonged exposure to dirt, smoke, or other substances. For example, a mold infection can cause black nasal discharge in people with weakened immune systems.

Meanwhile, if you're suffering from excessive runny nose, taking antihistamines can help alleviate it. Histamine irritates the nasal mucosa, causing a runny nose. Antihistamines block the action of histamine, thereby alleviating the symptoms. For severe runny noses, an ENT specialist can also offer nasal suctioning.

 

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The nasal discharge is usually clear in case of rhinitis.

I know it's yellow when you have a cold.

 

Depending on your health, you may have a runny nose.

Are there this many different colors?