The fastest ways to get phlegm out of your throat are drinking warm fluids, gargling salt water, and using a controlled coughing technique called the huff cough. These work because they thin the mucus, loosen it from the throat lining, or physically push it upward so you can spit it out. For stubborn or recurring phlegm, you may need to address what’s causing it in the first place.
Why Phlegm Gets Stuck
Your airways are lined with tiny hair-like structures called cilia that constantly sweep mucus upward toward your throat, where you swallow it without noticing. This system works well under normal conditions. But during infections, allergies, or irritation, your body ramps up mucus production and the mucus itself becomes thicker. The cilia can’t keep up, so mucus accumulates and you feel that familiar glob sitting in your throat.
When cilia-driven clearance falls behind, coughing becomes the backup system. A cough generates airflow roughly 100 times more forceful than normal breathing, which is enough to shear mucus off airway walls and push it out. The problem is that random throat clearing and weak coughs often aren’t effective. Targeted techniques work better.
The Huff Cough Technique
The huff cough is a controlled breathing method that moves phlegm more effectively than regular coughing. It works by getting air behind the mucus in your smaller airways and then pushing it into the larger ones where a final cough can expel it. Think of the motion as fogging up a mirror: smaller, forceful exhales rather than one big violent cough.
Here’s how to do it:
- Inhale slowly through your nose, filling your lungs about three-quarters full.
- Hold for two to three seconds. This traps air behind the mucus.
- Exhale slowly but forcefully through an open mouth, as if you’re trying to fog up a window. This is the “huff.” It shifts mucus from the smaller airways into the larger ones.
- Repeat one or two more times, then follow with one strong cough to clear the mucus out.
Run through this cycle two or three times depending on how congested you feel. One important detail: avoid gasping in quickly through your mouth between huffs. Quick inhales can push mucus back down and trigger uncontrolled coughing fits.
Warm Fluids and Honey
Staying well hydrated thins your mucus, making it easier for your body to move. Warm liquids are especially helpful because the warmth loosens thick secretions and the steam moistens irritated airways. Tea, broth, and warm water with lemon all work.
Adding honey gives you an extra edge. Honey thins mucus so it’s less likely to clog your throat, and it coats the throat lining to calm the nerve endings that trigger coughing. A teaspoon or two swallowed straight, or stirred into warm water or tea, is the standard approach. Studies have found honey can outperform common over-the-counter cough suppressants in children. Never give honey to a child under one year old, though, because of the risk of infant botulism.
Salt Water Gargle
Gargling warm salt water draws moisture out of swollen throat tissue and helps break up mucus so you can spit it out. Mix about a quarter to a half teaspoon of table salt into 8 ounces of warm water, gargle for 15 to 30 seconds, and spit. You can repeat this several times a day. It won’t cure whatever’s causing your phlegm, but it provides quick temporary relief and costs nothing.
Over-the-Counter Expectorants
Guaifenesin (sold as Mucinex and many store brands) is the main over-the-counter expectorant. It works by thinning your mucus secretions, making them easier to cough up. The standard adult dose for the short-acting version is 200 to 400 milligrams every four hours. Extended-release versions are taken as 600 to 1,200 milligrams every twelve hours. Follow the package instructions for the specific product you buy.
One thing to avoid: cough suppressants containing dextromethorphan. Those are designed to stop you from coughing, which is the opposite of what you want when you’re trying to clear phlegm. If you’re buying a combination product, check the label to make sure it contains only an expectorant.
Saline Nasal Rinses
A lot of throat phlegm actually starts in your nose. Post-nasal drip, where mucus drains from the back of your nasal passages into your throat, is one of the most common reasons people feel a constant glob of phlegm. Saline nasal irrigations using a neti pot or squeeze bottle flush out excess mucus and thin what remains. Saline nasal sprays are a milder option that can keep nasal passages moist throughout the day. Both help reduce the volume of mucus sliding down into your throat.
Sleeping Position Matters
Phlegm often feels worse at night because lying flat lets mucus pool at the back of your throat. Elevating your head helps gravity do the work of draining mucus downward instead of letting it collect. You can prop yourself up with extra pillows or place a wedge under the head of your mattress. This position also reduces acid reflux, which can be another source of throat mucus (more on that below).
Common Causes Worth Addressing
Clearing phlegm in the moment is one thing. If it keeps coming back, it helps to figure out why your body is producing so much of it.
Allergies and Sinus Issues
Allergic reactions cause your nasal lining to produce extra mucus, which drips into your throat. Over-the-counter antihistamines, decongestants, and steroid nasal sprays can all reduce this at the source. If allergies are a regular problem for you, a daily nasal steroid spray tends to be more effective than treating symptoms after they appear.
Infections
Colds and other respiratory infections are the most obvious cause of excess phlegm. Bacterial infections, even without antibiotics, typically resolve in 10 to 14 days. Viral infections can linger up to three weeks. During that time, the strategies above (fluids, huff coughing, expectorants, steam) are your main tools.
Silent Reflux
Laryngopharyngeal reflux, sometimes called silent reflux, is a lesser-known cause of chronic throat phlegm. Stomach acid travels all the way up into the throat, irritating the lining and triggering excess mucus production. Unlike typical heartburn, many people with this condition don’t feel burning in their chest. Instead, they notice persistent phlegm, frequent throat clearing, and hoarseness. If your phlegm doesn’t match any obvious cold or allergy pattern, this is worth exploring with a doctor.
What Phlegm Color Can Tell You
Clear or white phlegm is normal and usually means allergies, mild irritation, or the tail end of a cold. Yellow or green phlegm suggests your immune system is actively fighting something, though it doesn’t automatically mean you need antibiotics. Many yellow-green infections clear on their own.
Red, pink, or bloody phlegm is the color that warrants prompt medical attention. It can indicate a more serious infection or, in some cases, something that needs further investigation. If you’re a smoker and coughing up blood, that’s especially important to get checked.