A runny nose usually responds well to simple home care: saline rinses, warm liquids, humidity, and the right over-the-counter medicine for the cause. Most cases clear up within a week or two, but knowing whether you’re dealing with a cold or allergies helps you pick the most effective approach.
Figure Out the Cause First
The two most common reasons for a runny nose are viral infections (colds) and allergies, and they call for different treatments. A few patterns help you tell them apart. Allergies almost never cause a fever or sore throat but typically make your eyes itch. Colds usually bring a sore throat, sometimes a fever, and rarely cause itchy eyes. Both cause sneezing and congestion.
Duration is another clue. A cold generally lasts 3 to 10 days, though a lingering cough can stick around a couple of weeks longer. Seasonal allergies can last several weeks, often flaring whenever you’re exposed to the trigger. If your runny nose shows up at the same time every year or worsens around pets, pollen, or dust, allergies are the likely culprit.
Home Remedies That Actually Help
Saline Nasal Rinses
Flushing your nasal passages with a saltwater solution thins mucus and washes out irritants. You can use a squeeze bottle, bulb syringe, or neti pot. The saline prevents the burning you’d feel from plain water by matching the salt concentration your nasal tissue expects.
Water safety matters here. The FDA warns that tap water is not safe for nasal rinsing because it isn’t filtered enough to remove all potentially infectious organisms. Use distilled or sterile water (the label will say so), water that’s been boiled for 3 to 5 minutes and cooled to lukewarm, or water filtered through a device rated to trap infectious organisms. Boiled water can be stored in a clean, sealed container and used within 24 hours.
Warm Liquids and Steam
Hot drinks do more than feel comforting. Research published in the journal Rhinology found that drinking hot water or soup at around 65°C (149°F) increased the speed at which mucus moves through the nasal passages. The warmth, taste, and aroma of a hot drink also stimulate saliva and airway secretions that lubricate and soothe irritated tissue. Tea, broth, and plain hot water all work.
Humidity
Dry indoor air irritates nasal membranes and can make a runny nose worse. Keeping your home’s relative humidity between 30 and 50 percent strikes the right balance: moist enough to soothe your nose, dry enough to discourage mold growth. A simple hygrometer (available at hardware stores for a few dollars) lets you check. If you use a humidifier, clean it regularly to prevent bacteria and mold from building up inside.
Over-the-Counter Medicines
Antihistamines for Allergies
If your runny nose is allergy-driven, antihistamines are the go-to choice. They work by blocking histamine, a chemical your immune system releases during an allergic reaction that triggers swelling, itching, and excess mucus production. Second-generation antihistamines (the non-drowsy kind, like cetirizine and loratadine) are generally preferred because they don’t cross into the brain as easily, so they’re less likely to make you sleepy or interact with other medications. First-generation options like diphenhydramine and chlorpheniramine work too, but expect drowsiness.
Decongestants: Choose Carefully
Decongestants shrink swollen blood vessels in the nasal passages, which helps with stuffiness more than a runny nose itself. If you reach for one, be aware of a major development: the FDA has proposed removing oral phenylephrine from the market after an advisory committee unanimously concluded it doesn’t work as a nasal decongestant at recommended doses. Many popular cold medicines on store shelves still contain oral phenylephrine as their only decongestant ingredient, so check the label. The nasal spray form of phenylephrine is not affected by this ruling, and pseudoephedrine (sold behind the pharmacy counter in most states) remains effective.
When a Prescription Makes Sense
If your runny nose doesn’t respond to home care or OTC options, a prescription nasal spray that blocks the glands in your nose from overproducing fluid can help. It comes in two strengths: a lower concentration for ongoing allergic or non-allergic rhinitis and a higher concentration for cold-related runny noses, typically used for no more than four days. This type of spray targets only the runny nose itself and won’t help with congestion, sneezing, or postnasal drip, so it’s best for people whose primary complaint is constant dripping.
Runny Noses in Children
Young children get runny noses frequently, and the instinct to reach for medicine is strong. But the rules are different for kids. The FDA does not recommend OTC cough and cold medicines for children under 2 because of the risk of serious side effects, including dangerously slowed breathing. Manufacturers voluntarily label these products with a warning not to use them in children under 4.
Doubling up on products is a common and dangerous mistake. Many cold medicines contain overlapping ingredients, and giving a child more than one product with the same active ingredient can lead to an overdose. Never give adult-formulated medicine to a child. Homeopathic cough and cold products aren’t a safer alternative either. The FDA has documented cases of children under 4 experiencing seizures, allergic reactions, difficulty breathing, and dangerous drops in blood sugar or potassium after taking homeopathic cold remedies.
For babies and toddlers, saline drops and a bulb syringe to gently suction mucus are the safest and most effective tools. A cool-mist humidifier in the room helps too.
Signs That Need Medical Attention
Most runny noses resolve on their own, but certain symptoms suggest something more is going on. Contact a doctor if your symptoms last more than 10 days, you develop a high fever, the discharge turns yellow-green (especially with facial pain, which can signal a bacterial sinus infection), or the discharge is bloody. A runny nose that starts after a head injury needs prompt evaluation.
For infants under 2 months, any fever alongside a runny nose warrants a call to the pediatrician. The same goes for a baby whose congestion is making it hard to nurse or breathe.