Lung congestion clears fastest when you thin the mucus and then help your body move it upward and out. Your airways are lined with millions of tiny hair-like structures that beat in coordinated waves, pushing mucus toward your throat like a slow escalator. When you’re congested, that system gets overwhelmed because your body is producing too much mucus, the mucus is too thick, or both. The goal of every remedy below is to restore that process: thin the mucus, speed up its movement, and cough it out effectively.
Drink More Fluids Than You Think You Need
Dehydration thickens mucus, making it harder for your airways to push it out. Water, broth, and warm tea all help keep mucus fluid enough to move. There’s no magic number, but if your urine is pale yellow, you’re likely hydrated enough. Warm liquids have an edge over cold ones because heat loosens mucus on contact and can soothe irritated airways at the same time.
Keep Indoor Humidity Between 30% and 50%
Dry air pulls moisture from the mucus lining your airways, turning it sticky and hard to clear. A cool-mist humidifier in your bedroom can make a noticeable difference overnight. The Mayo Clinic recommends keeping indoor humidity between 30% and 50%. Go above 50% and you start encouraging mold and dust mites, which can make congestion worse.
If you don’t have a humidifier, a hot shower works as a short-term substitute. Sit in the bathroom with the door closed and breathe the steam for 10 to 15 minutes. You can also drape a towel over your head and lean over a bowl of hot water for a similar effect.
Use the Huff Cough Technique
A regular forceful cough can tire you out and irritate your airways without actually clearing much mucus. The huff cough is a technique developed for people with chronic lung conditions, but it works for anyone with congestion.
Sit on a chair or the edge of your bed with both feet flat on the floor. Tilt your chin up slightly and open your mouth. Take a slow, medium-depth breath in and hold it for two to three seconds. Then exhale with a quick, forceful “huff,” like you’re trying to fog up a mirror. The key difference from a normal cough is that you’re using smaller, more forceful exhales rather than one big explosive cough. This creates steady airflow that pushes mucus up through your airways without slamming them shut. Repeat the cycle three or four times, then do a normal cough to clear whatever has moved up into your throat.
Try Postural Drainage
Gravity is a free tool. By positioning your body so that congested parts of your lungs are above your airways, mucus drains downward toward your throat where you can cough it out. The position you use depends on where you feel the congestion.
- Upper lungs: Sit upright with a pillow under your knees for a slight bend. Lean forward through your forearms across your thighs.
- Middle and lower lungs: Lie flat on your back with a pillow under one side to create a slight tilt. A small pillow under your waist and hips adds a gentle downward slope that helps mucus travel toward your central airways.
- General congestion: Sit semi-upright at about 45 degrees with your back flat against the bed or chair and pillows under your knees.
Stay in each position for five to ten minutes while doing slow, deep breathing or huff coughs. You can also have someone cup their hands (fingers together, palms curved like they’re scooping water) and rhythmically clap your upper back and chest. This percussion vibrates the airways and shakes mucus loose. One important safety note: never percuss below the rib cage, as this can damage organs.
Over-the-Counter Expectorants
Guaifenesin is the only OTC expectorant available in the U.S. It works by thinning the mucus in your lungs so it’s easier to cough up. The standard adult dose is 200 to 400 mg every four hours for regular tablets, or 600 to 1200 mg every twelve hours for extended-release versions. It’s not recommended for children under four.
Guaifenesin won’t stop you from coughing, and that’s the point. You want to cough productively. If your cough is keeping you from sleeping, a cough suppressant containing dextromethorphan may help at night. Dextromethorphan is the only OTC cough suppressant that has been shown to outperform placebo in objective cough-counting studies, with roughly 17% more cough suppression than a placebo syrup. That’s a modest effect, but it can be enough to let you rest.
Honey as a Nighttime Remedy
If you’d rather skip the pharmacy, honey is a surprisingly effective option for nighttime cough and congestion. A study at Penn State compared buckwheat honey, dextromethorphan, and no treatment in children with upper respiratory infections. Honey outperformed no treatment across every measure: cough frequency, cough severity, how bothersome the cough was, and sleep quality for both the child and the parent. Head to head, honey and dextromethorphan showed no significant difference.
A spoonful of honey 30 minutes before bed coats the throat and may calm the cough reflex enough to improve sleep. This applies to adults too, though the study was conducted in children. Do not give honey to infants under one year old due to the risk of botulism.
Nebulized Saline for Stubborn Congestion
For congestion that won’t budge with simpler methods, inhaling saline through a nebulizer can deliver moisture directly into your lower airways. Normal saline (0.9% salt concentration) adds moisture, while hypertonic saline (typically 3% to 7%) actively draws water into the airways, rehydrating thick mucus from the outside in. Hypertonic saline is commonly used in cystic fibrosis care but can benefit anyone with persistent thick mucus. You’ll need a prescription or recommendation from a provider to get the right concentration, plus a nebulizer device.
What Mucus Color Actually Tells You
Many people assume green or yellow mucus means a bacterial infection that needs antibiotics. That’s a myth. Research has well established that you cannot reliably distinguish a viral infection from a bacterial one based on mucus color alone. Your immune cells produce enzymes that turn mucus green regardless of whether bacteria are involved. Most sinus and chest infections are viral, meaning antibiotics won’t help.
There are situations where the congestion warrants more attention: symptoms that drag on past 10 days without improvement, congestion that gets worse after a week of feeling better, discharge that looks uniformly white like pus, a high fever that isn’t coming down, or severe symptoms that don’t respond to the remedies above. These patterns suggest something beyond a typical viral infection.
Putting It All Together
The most effective approach combines several of these strategies. Stay well hydrated throughout the day. Run a humidifier at night. Use huff coughing and postural drainage two to three times daily when congestion is at its worst, often in the morning and before bed. Add guaifenesin during the day if you need extra help loosening mucus, and consider honey or a cough suppressant at night to protect your sleep. Most viral congestion peaks around day three to five and resolves within 10 days. If yours follows that pattern, even imperfectly, your body is doing its job.