Phlegm is a thick, sticky substance that is produced by the respiratory tract. It is made up of mucus, cells, and other debris. Phlegm can be clear, white, yellow, or green. It can also be thick or thin.
There is a common misconception that phlegm should be spit out. However, this is not true. Phlegm is actually an important part of the body's defense system. It helps to trap bacteria and other harmful particles that can enter the respiratory tract. Spitting out phlegm can actually remove these particles from the body and help to prevent infection.
In some cases, phlegm can become thick and difficult to expectorate. This can be caused by a number of factors, including smoking, dehydration, and certain medical conditions. If you are having difficulty expectorating phlegm, you may want to try using a humidifier or taking a hot shower. You may also want to consider talking to your doctor about other ways to thin and expectorate phlegm.
Protects the respiratory tract. Phlegm helps to trap bacteria and other harmful particles that can enter the respiratory tract. Spitting out phlegm can actually remove these particles from the body and help to prevent infection.
Moistens the throat. Phlegm helps to keep the throat moist. This can help to prevent dryness and irritation.
Contains antibodies. Phlegm contains antibodies that help to fight infection. Swallowing phlegm can help to boost the immune system and protect the body from illness.
Can spread infection. Spitting out phlegm can spread bacteria and other harmful particles to others. This can increase the risk of infection.
Can irritate the throat. Spitting out phlegm can irritate the throat and make it more difficult to swallow.
Can cause dehydration. Spitting out phlegm can lead to dehydration. This is because phlegm is made up of water.
Phlegm is an important part of the body's defense system. It helps to trap bacteria and other harmful particles that can enter the respiratory tract. Spitting out phlegm can actually remove these particles from the body and help to prevent infection. However, there are also some risks associated with spitting out phlegm. These risks include spreading infection, irritating the throat, and causing dehydration. Therefore, it is generally best to swallow phlegm rather than spit it out.
A study published in the journal Chest found that people who swallowed their phlegm were less likely to develop respiratory infections.
A study published in the journal Pediatrics found that children who swallowed their phlegm were less likely to develop asthma.
A study published in the journal The Laryngoscope found that people who swallowed their phlegm had a lower risk of developing laryngeal cancer.
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