Most excess mucus clears up on its own within a couple of weeks, but you can speed things along with a few simple strategies: staying well hydrated, using saline nasal rinses, breathing humidified air, and elevating your head while you sleep. These approaches work by thinning the mucus so your body’s natural clearance system can move it out more efficiently.
Before diving into what works, it helps to know why your body makes mucus in the first place. Mucus lines your airways, sinuses, and digestive tract as a protective shield. It traps germs, dust, and irritants, then tiny hair-like structures called cilia sweep it all toward your throat to be swallowed or coughed out. When you’re fighting an infection or dealing with allergies, your body ramps up production and the mucus thickens, which is why you feel congested, stuffy, or like something is stuck in the back of your throat.
Drink More Fluids to Thin Mucus
Mucus thickens when it loses water content. The less hydrated the fluid lining your airways, the higher the concentration of mucus proteins becomes, making everything stickier and harder to move. This is why hospitals humidify the air patients breathe during treatment: keeping airways moist prevents secretions from becoming thick and difficult to clear.
Plain water, warm broths, and herbal teas all help. Warm liquids have an added benefit: they can soothe irritated airways and may loosen congestion in your throat and chest faster than cold drinks. There’s no magic number of glasses per day, but if your urine is pale yellow, you’re generally well hydrated. If you’re running a fever or breathing through your mouth at night, your fluid needs go up.
Rinse Your Sinuses With Saline
Saline nasal irrigation is one of the best-studied home remedies for mucus buildup. Flushing warm salt water through your nasal passages physically washes out mucus, allergens, and inflammatory debris. It also appears to speed up the cilia that sweep mucus along, helping your sinuses drain more effectively on their own afterward.
You can use a neti pot, a squeeze bottle, or a bulb syringe. Fill it with distilled, sterile, or previously boiled water mixed with a pre-measured saline packet (or a quarter teaspoon of non-iodized salt per cup of water). Lean over a sink, tilt your head, and let the solution flow in one nostril and out the other.
Daily saline rinsing makes a significant difference for chronic sinus congestion. In one study, people with ongoing sinus symptoms who rinsed daily with saline saw a 64 percent improvement in overall symptom severity compared to those who relied on their usual care alone. Even for short-term colds, regular rinsing shortened symptom duration and reduced the number of days with nasal congestion. Woodworkers exposed to airborne dust who adopted daily saline rinses saw improvements in sinus symptoms and nasal airflow.
Keep Your Air Humid, Not Dry
Dry indoor air pulls moisture out of your airways and makes mucus thick and sticky. When humidity drops below about 50 percent, the particles in your airway surface fluid change size, and the mucociliary system that sweeps mucus out of your lungs and sinuses becomes less effective. Winter heating, air conditioning, and airplane cabins all push humidity well below that threshold.
A cool-mist humidifier in your bedroom can help, especially at night when mouth breathing dries things out further. Clean the humidifier regularly to prevent mold and bacteria from growing in the reservoir. A hot shower works too: spending 10 to 15 minutes breathing steam loosens congestion and provides temporary relief, particularly when you’re dealing with a cold or sinus infection.
Elevate Your Head at Night
Mucus pools at the back of your throat when you lie flat, which is why post-nasal drip tends to feel worse at bedtime and first thing in the morning. Sleeping with your head slightly elevated encourages gravity to drain mucus downward through your sinuses rather than letting it collect where it triggers coughing and throat irritation.
You don’t need to sit upright. Propping yourself up with an extra pillow or placing a wedge under the head of your mattress is enough. This position also reduces acid reflux, which can irritate your throat and trigger additional mucus production.
Try Honey for Cough and Throat Mucus
Honey coats the throat and has mild anti-inflammatory properties that can calm the urge to cough. In several clinical studies, honey reduced coughing and improved sleep in people with upper respiratory infections, performing about as well as a common over-the-counter antihistamine used for cough suppression.
Half a teaspoon to one teaspoon (about 2.5 to 5 milliliters) is the typical amount used in studies, swallowed straight or stirred into warm water or tea. One important caution: never give honey to a child under age one, because of the risk of infant botulism.
What Doesn’t Actually Help
Cutting Out Dairy
The idea that milk makes your body produce more mucus is one of the most persistent health myths around, but research doesn’t support it. Drinking milk does not cause your body to make more phlegm. What actually happens is that milk and saliva mix in your mouth to create a slightly thick coating on your tongue and throat, which feels like mucus but isn’t. A study of children with asthma found no difference in symptoms whether they drank dairy milk or soy milk. If you’re congested, there’s no reason to avoid your morning coffee with cream.
Using Mucus Color to Self-Diagnose
Many people assume green or yellow mucus means a bacterial infection that needs antibiotics. Harvard Health has been clear on this point: you cannot reliably distinguish a viral sinus infection from a bacterial one based on mucus color alone. Your mucus naturally changes color as your immune system responds to any irritant. It often starts clear, turns white or yellow as white blood cells accumulate, and can shift to green as those cells break down. This progression happens with viral infections, bacterial infections, and even allergies. Most sinus symptoms are caused by viruses or allergies, not bacteria.
Over-the-Counter Options
When home remedies aren’t enough, two types of drugstore products can help. Expectorants (the active ingredient is guaifenesin) work by thinning the mucus in your chest and airways so you can cough it up more easily. These are most useful when you have a productive, “wet” cough and feel like mucus is sitting in your chest. Drink extra water when you take them, since they rely on adequate hydration to work.
Decongestants shrink the swollen blood vessels in your nasal passages, which opens up airflow and lets mucus drain. Nasal spray versions work faster than pills but should not be used for more than three consecutive days, because your nasal passages can become dependent on them and swell up even worse when you stop (a rebound effect). Oral decongestants can raise blood pressure, so they’re not ideal if you have hypertension or heart problems.
Signs That Need Medical Attention
Most mucus problems resolve within two to three weeks. But a cough that lingers beyond that window, especially with thick greenish-yellow phlegm, warrants a visit to your doctor. The same goes if you develop wheezing, a fever, shortness of breath, or unexplained ankle swelling or weight loss alongside your cough.
Seek emergency care if you’re coughing up blood or pink-tinged phlegm, having trouble breathing or swallowing, or experiencing chest pain. These symptoms can signal something beyond a routine respiratory infection.