Being sick can come with a variety of symptoms, and consistent coughing with phlegm can be one of the most unpleasant.
Don’t be mistaken: Phlegm isn’t always a bad thing.
In fact, our bodies produce this mucus to help trap particles and germs to keep us healthy.
However, too much phlegm is usually a sign of an infection and can be bothersome..
If you’re producing extra phlegm, there are ways to help your body get back to normal.
In this article, I’ll explain what phlegm is and what the different colors of phlegm may indicate.
Then I’ll discuss natural ways to alleviate phlegm with home remedies as well as medications.
Get ready to breathe more easily!
What Is Phlegm?
Phlegm is a liquid made by the cells lining the nose, throat, upper airways, and lungs.
While the word “phlegm” is often used interchangeably with “mucus”, there are key differences between the two:
- Mucus is made by the nose and sinuses
- Phlegm is thicker than mucus
- Excess mucus can clog the lungs and cause you to cough
Causes
A variety of conditions and irritants can cause phlegm.
This includes:
- Bacterial infections like bronchitis, sinusitis, and pneumonia
- Viral infections like the common cold and influenza (flu)
- Allergies
- Asthma
- Chronic lung diseases like chronic obstructive pulmonary disease (COPD), cystic fibrosis, and bronchiectasis
Types of phlegm
Though typically clear, phlegm can take on different colors depending on its cause.
- Clear phlegm: Clear phlegm is the most common type of phlegm and is usually triggered by an irritant, allergy, or viral infection.
- Green or yellow phlegm: Yellowish-green phlegm may signify that your body has sent white blood cells to your nose, throat, or lungs to fight a sinus infection, pneumonia, bronchitis, or other infection. Cystic fibrosis ( a chronic illness) can also cause phlegm of this color.
- Brown phlegm: When old blood mixes with phlegm, it can turn the liquid a brown shade. This is more common in people living with chronic lung diseases.
- White phlegm: This color may signify a viral infection, allergies, or asthma.
- Black phlegm: While less common, black phlegm is often a sign that you’ve inhaled something black, such as smoke or coal dust. Often linked to smoking, black phlegm can also be caused by cystic fibrosis and pneumoconiosis, a condition linked to coal miners.
- Red or pink phlegm: Red or pink phlegm is usually linked to blood. Always see a doctor in this instance, as it could be related to a serious infection, bleeding in your lungs or airways, or cancer.
Treatments for Phlegm
If you have excess phlegm, some natural home remedies may help you get your body back to normal.
Here’s what the science says about some common treatments to get rid of phlegm.
Humidifier
Keeping the air around you moist may help prevent irritation of the nasal passages and loosen phlegm, allowing it to be coughed up more easily.
So try using a cool-mist humidifier, especially where you sleep, to add moisture to the air you breathe.
Gargle salt water
While there isn’t a lot of research on this remedy, swishing with salt water may help reduce inflammation in the throat.
Add half a teaspoon of salt to eight ounces of warm water and gargle the water in the back of your throat. As a bonus, this may help ease a sore throat.
Liquids
Staying well hydrated can help keep mucus thin.
In particular, hot beverages and soup may help clear nasal phlegm.
If you like tea, add honey to help relieve excess coughing.
Over-the-counter (OTC) medications
Some OTC medications can help relieve phlegm, but use these in moderation since phlegm production is a natural way for our bodies to fight off infection, and too much medication could impair this function.
- Expectorants: Expectorants like guaifenesin (Mucinex) help thin phlegm, making it easier to blow out or cough up.
- Vapor rubs: Vapor rubs provide relief from coughs and chest congestion.
- Decongestants: Decongestants that contain pseudoephedrine (like Sudafed) can dry out mucus in the chest, nose, and throat.
Coughing
While it can be a nuisance, coughing is the body’s way of clearing away excessive phlegm, so use cough suppressants sparingly.
Eucalyptus
Ointments and diluted essential oils containing eucalyptus are often used to help relieve congestion.
Rubbing either onto the chest or using one in a warm bath or diffuser may help reduce mucus and subdue coughs.
Stop smoking
Smoking irritates the airways, triggering the lungs to produce more phlegm.
Lighting up also significantly increases the risk of conditions that lead to excess phlegm such as COPD and lung cancer.
Limit alcohol intake
Keep alcohol intake to a minimum, or better yet, avoid it altogether.
Excessive alcohol consumption leads to dehydration and also makes it harder to clear out phlegm.
When to See a Doctor
Phlegm typically means that your body is doing its job of fighting off illness and infection, but in some cases, your doctor may need to intervene.
If you have tried the above treatments but continue to produce excess phlegm, and this goes on for longer than two weeks, see a doctor.
Also contact a healthcare provider right away if your phlegm is any shade of red, black, or brown.
How K Health Can Help
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Frequently Asked Questions
K Health articles are all written and reviewed by MDs, PhDs, NPs, or PharmDs and are for informational purposes only. This information does not constitute and should not be relied on for professional medical advice. Always talk to your doctor about the risks and benefits of any treatment.
K Health has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We avoid using tertiary references.
-
Alcohol and Airways Function in Health and Disease. (2007).
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2081157/ -
Anti-Inflammatory Effect of Salt Water and Chlorhexidine 0.12% Mouthrinse After Periodontal Surgery: A Randomized Prospective Clinical Study. (2021).
https://link.springer.com/article/10.1007/s00784-020-03748-w -
Efficacy of Six Tasks to Clear Laryngeal Mucus Aggregation. (2016).
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5266670/ -
Eucalyptus. (2021).
https://www.mountsinai.org/health-library/herb/eucalyptus -
Immune-Modifying and Antimicrobial Effects of Eucalyptus Oil and Simple Inhalation Devices. (2010).
https://pubmed.ncbi.nlm.nih.gov/20359267/ -
Marvels of Mucus and Phlegm. (2020).
https://newsinhealth.nih.gov/2020/08/marvels-mucus-phlegm -
What Does the Color of Phlegm Mean? (2017).
https://wexnermedical.osu.edu/blog/what-does-the-color-of-your-phlegm-mean