Ear, Nose & Throat 14 Reasons You Have a Runny Nose By Kristin Hayes, RN Updated on March 05, 2023 Medically reviewed by Benjamin F. Asher, MD Fact checked by Heather Mercer Print A runny nose (rhinorrhea) can strike any time of year. While a common cold, allergies, and COVID-19 are common culprits, a lot of other things can cause congestion or a runny nose—including spicy food or even hormones. This article looks at 14 reasons you may have a runny nose, how to deal with it, and when to see a healthcare provider. The Common Cold FG Trade / Getty Images Also known as: Upper respiratory infection (URI), rhinovirus The common cold can be caused by over 200 viruses, with rhinovirus being the most common. When you have a cold, fluids can pass more easily than usual out of your blood vessels and into your nose. The running usually starts within the first two to three days after you pick up the virus. Mucus usually starts out clear and may turn white, yellow, or even green after a couple of days. Decoding Mucus Color: Yellow, Green, Brown, and More Treatments for a runny nose from the common cold include: Atrovent (intranasal ipratropium) nasal spray Dimetapp Cold & Allergy (brompheniramine) Chlor-Trimeton (chlorpheniramine) Benadryl Allergy (diphenhydramine) If your runny nose continues for more than 10 days, see a healthcare provider. You may have a bacterial infection that needs to be treated with antibiotics. COVID-19 Maskot / Getty Images A runny nose is one possible symptom of COVID-19. Other symptoms include: Fever or chillsSore throatNasal congestionCoughShortness of breathFatigueMuscle or body achesHeadacheLoss of taste and/or smellNausea or vomitingDiarrhea If you suspect your runny nose and other symptoms are caused by COVID-19, get tested—especially if you're at high risk for severe symptoms. Most people with COVID-19 can treat the disease at home with over-the-counter medicines. If you develop more severe symptoms, your healthcare provider may prescribe an antiviral medicine. Available antivirals for COVID-19 include Paxlovid, Veklury, and Lagevrio. You can prevent COVID-19 infection or lower symptom severity by getting vaccinated. At Risk? If you're at risk for severe disease or become really sick with COVID-19, get medical attention right away. Treatments are most effective when started within days of developing symptoms. Allergies LeoPatrizi/iStock Also known as: Hay fever and allergic rhinitis Allergic reactions often cause a runny nose. It may happen most often in the spring or fall. In allergies, the runny nose comes from your body's inflammatory response to pollen, spores, mold, or other allergens in the air. When you inhale an allergen, your immune system sounds the alarm and releases chemicals (histamines for example) that cause inflammation in your nasal membranes and eyes. Pollen comes from: Flowering plantsTreesWeedsGrasses You may also be allergic to dust, pet dander, or smoke from wildfires. Nasal secretions from allergies are usually clear, but they may also contain pus. For mild to moderate allergy symptoms, the first line of treatment is an oral antihistamine or nasal antihistamine spray. Glucocorticoid nasal sprays, which help decrease inflammation, may also be effective. While antihistamines help with a runny nose, they're not generally effective against allergy-related nasal congestion. Treatment of Allergic Rhinitis Cold Air Axel Bueckert / EyeEm / Getty Images Have you gone outside to enjoy the fresh snow only to have a runny nose ruin the moment? If outside long enough, you might even develop chapped lips from constantly wiping your nasal secretions away from your upper lip. Cold, dry air is known to dry out the nasal membranes. The change causes your inflammatory response and nasal nervous system reflexes to work together causing the nasal glands to produce mucus to moisturize and warm the air entering the nose. As a result, you end up with a drippy nose. Wearing a scarf or mask over your nose may help prevent it. Eating, Especially Spicy Food JBfotoblog / Getty Images Also known as: Gustatory rhinitis Spicy foods like hot chili peppers are very likely to make your nose run if you have gustatory rhinitis, a form of nonallergic rhinitis. Common triggers are spices such as black pepper, curry, garlic, hot sauce, salsa, ginger, and chili powder. However, any food can cause this reaction. Scientists are still trying to figure out exactly why eating food makes some people get a runny nose. What they do know is that it's not really an immune response. It's more likely related to stimulation (or irritation) of the trigeminal nerve. And it may be associated with a parasympathetic response, which is involved in digestion. Some people love to push their limits, and desire the full experience of their eyes watering, nose running, and throat burning as they eat their fire alarm hot wings. But, if you are not a fan of the experience, you can reduce your symptoms of gustatory rhinitis when you simply avoid spicy foods. Another option, however, is taking medicine such as intranasal atropine which is helpful when you can't (or don't want to) avoid foods that are spicy. As a last resort, surgery can be helpful if it's significantly impacting your quality of life. Hormones Hero Images / Getty Images Also known as: Hormonal rhinitis Hormones can directly affect the membranes in your nasal passages, causing your mucus glands to become more reactive. Hormones that may be involved include: Thyroid hormones Growth hormone Female sex hormones (estrogen and progesterone) Symptoms related to rhinitis during a woman's menstrual cycle, while taking birth control, or during pregnancy, seem to mirror estrogen levels. For example, peak levels of estrogen that occur midway through the menstrual cycle can increase nasal membrane reactivity and trigger cytokine production which can lead to inflammation (congestion and runny nose) at that time. Those are also common symptoms during pregnancy when mucus membranes become more reactive and there is an increase blood flow to your nasal blood vessels. Research shows that 39% of women experience runny nose and congestion during pregnancy. Experts don't know much yet about treating hormonal rhinitis. Hormone replacement therapy does not seem to alleviate symptoms. If you're pregnant, you can try nasal saline spray or exercise to potentially decrease symptoms. If you need more help, talk to your healthcare provider about whether any of these drugs are a safe option for you and your baby: Pseudoephedrine Claritin Zyrtec Atrovent Many other possible treatments may be harmful to your baby. Always ask your healthcare provider before starting a new medication. Congestion and Runny Nose During Pregnancy Medications Photography by ZhangXun / Getty Images Also known as: Medication-induced rhinitis A runny nose is a known side effect of some medications. Each medication can cause a runny nose in a different way. While not a complete list, medications used to treat the following conditions are known to cause runny nose in some people: Inflammation, pain High blood pressure Cardiovascular disease Enlarged prostate Erectile dysfunction Mental illness, depression A runny nose is also a possible side effect of birth control. Exercise Holde Schneider / Getty Images Also known as: Vasomotor rhinitis Aerobic exercise such as running, aerobics, and even intercourse may cause your runny nose. The increased blood flow to the nose during physical activity causes that watery drip. Research shows that more athletes suffer from exercise induced rhinitis (EIR) than non-athletes and 40% indicate it affects their performance. But if you experience a runny nose while being active outdoors, the cause may be more realistically related to: AllergiesCold weatherAnother irritant If you experience a runny nose frequently while being active, you can ask your healthcare provider if a medication called Atrovent (ipratropium) would be a good choice for you. It relaxes the muscles around your airways so you can breathe better. Why Exercise May Be Causing Your Nose to Run Crying Sollina Images / Getty Images Crying naturally causes you to have a runny nose because: Tears drain from your eyes through small openings in your lower eyelids called lacrimal puncta.They then enter a tube called the nasolacrimal ductThat duct drains directly into your nose Once you stop crying, the runny nose should clear up pretty quickly. Chronic Sinusitis Cecilie_Arcurs / Getty Images The sinuses are four spaces (cavities) in your head connected by passageways. The sinuses are in charge of making mucus that drains from the nasal passageways into the nose. Mucus flushes bacteria and debris out of your nasal passages and into the back of the throat so you can swallow it. This keeps bacteria from getting trapped in your nose and causing an infection. When you're congested, bacteria stay in there and can lead to sinusitis (sinus infection). When it lasts for 12 weeks or more, it's called chronic sinusitis. Besides a runny nose, symptoms include: Sinus drainage down the back of the throat Facial pressure and pain Stuffy nose Reduced sense of taste or smell Some severe sinus infections require antibiotics, but most of them go away without medical treatment. To ease symptoms on your own, you can try: Using a saline or decongestant nasal sprayA warm moist cloth on your forehead or noseInhaling steam from a warm shower or bowl of hot water When Treatment Doesn't Work For chronic sinusitis that doesn't respond to medication or at-home treatments, your healthcare provider may recommend sinus surgery to treat the problem. Symptoms of Sinus Infection Sinus Polyps Dmytro Bosnak / Getty Images Sinus or nasal polyps are soft growths of tissue inside your nose and sinuses. They make it difficult for you to breathe. Nasal polyps are common in people who also have: Asthma Allergic rhinitis Chronic sinusitis Sensitivity to aspirin Cystic fibrosis A runny nose is just one symptom of sinus polyps. But you may also have: Nasal congestion Facial pressure Loss of smell and taste Headache Sinus drainage Mouth breathing Treating Polyps The first treatment for nasal polyps is usually medication. If that doesn't work, you may need surgery. Deviated Septum Hello Africa / Getty Images The septum is the bone and cartilage between your nostrils. When it leans to one side of the nasal cavity, it's called a deviated septum. A deviated septum can cause breathing problems, including a runny nose. Other symptoms are: Stuffy nose Difficulty breathing through either one or both nostrils Repeated sinus infections Noisy breathing (in babies and children) Mouth-breathing while asleep (in adults) Some people are born with a deviated septum. You can also get one from an injury like a broken nose. If symptoms are mild, a deviated septum doesn't need treatment. If symptoms are more serious, a surgery called septoplasty can correct it. Spinal Fluid Leak SCIEPRO / Getty Images A special fluid that surrounds your spinal cord and brain is called cerebrospinal fluid (CSF). It's held in by a membrane. When there's a tear in the membrane, the CSF can leak out. This can occur because of a: Head injury Surgery Medical procedures such as a spinal tap Sometimes, a spinal fluid leak occurs for no particular reason. Drainage from the ear and the nose are both rare symptoms that can occur. You may also develop a headache that gets worse when you sit but decreases when you lie down. Spinal fluid leaks are rare. The first treatment is usually bed rest. Other treatments may include saline infusions, IV caffeine infusions, and hydration. If those treatments don't work, you may need surgery. Churg-Strauss Syndrome dowell / Getty Images Churg-Strauss syndrome, also known as eosinophilic granulomatosis with polyangiitis (EGPA), is a rare disease that causes inflammation in the cells of your tissues or blood. People who develop Churg-Strauss have a history of asthma or allergies. It can affect: Lungs Sinuses Nose Heart Kidneys Skin Intestinal tract Joints Nerves In rare cases, Churg-Strauss syndrome can affect the brain. A runny nose is a common symptom of Churg-Strauss syndrome. Other symptoms include: Shortness of breath Chest pain Abdominal pain Bloody stool Skin rash Joint or muscle pain Numbness Mild Churg-Strauss syndrome is often treated with an anti-inflammatory medication called prednisone. Treating Churg-Strauss Other medications that can help treat Churg-Strauss syndrome include: Methotrexate azathioprine Mycophenolate mofetil Cytotoxic agents such as cyclophosphamide Mepolizumab Due to the risk of side effects and complications, some of these can only be used for a short period of time. When to See a Healthcare Provider A runny nose that isn't connected to a serious illness usually goes away on its own. But you should see a healthcare provider if: Your runny nose lasts more than 10 days You have a high fever You have a yellow or green discharge from your nose along with sinus pain or pressure You notice a foul smell coming from inside your nose Summary If you have a runny nose, it may be caused by something as simple as the common cold. But allergies, COVID-19, cold air, exercise, crying, spicy food, and several medical conditions can also make your nose run. If you have a runny nose for more than ten days or alongside severe symptoms, contact your healthcare provider. Frequently Asked Questions Is a runny nose contagious? Not necessarily. A runny nose can be a symptom of something that's contagious, like the common cold or COVID-19. But it could also have a non-contagious cause, like cold air, hormones, or allergies. Why is only one side of my nose runny? One side of your nose may be runny because of various reasons. Sometimes the common cold causes a runny nose on one side. You may have a deviated septum. In rare cases, it could be a spinal fluid leak or nasal/sinus cancer. Is a constant runny nose serious? A constant runny nose may not be serious. but talk to your healthcare provider if it lasts more than 10 days. You should also let them know if you have a runny nose along with other symptoms such as a high fever. 33 Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Centers for Disease Control and Prevention. Common cold. Stanford Children's Health. Common cold in children. Stockley RA, Bayley D, Hill SL, Hill AT, Crooks S, Campbell EJ. Assessment of airway neutrophils by sputum colour: Correlation with airways inflammation. Thorax. 2001;56(5):366-372. doi:10.1136/thorax.56.5.366 Centers for Disease Control and Prevention. Viruses or bacteria: What's got you sick? Centers for Disease Control and Prevention. COVID-19: Symptoms. Centers for Disease Control and Prevention. COVID-19 treatments and medications. Yale Medicine. Seasonal allergies (allergic rhinitis). Koskela HO. Cold air-provoked respiratory symptoms: The mechanisms and management. International Journal of Circumpolar Health. 2007;66(2):91-100. doi:10.3402/ijch.v66i2.18237 Jovancevic L, Georgalas C, Savovic S, Janjevic D. Gustatory rhinitis. Rhinology. 2010;48(1):7-10. doi:10.4193/Rhin07.153 Georgalas C, Jovancevic L. Gustatory rhinitis. Current Opinion in Otolaryngology & Head & Neck Surgery. 2012;20(1):9-14. doi:10.1097/MOO.0b013e32834dfb52 Molnár I, Kelemen E, Somogyiné-Vári E. The prevalence and characteristics of allergy in autoimmune thyroid diseases. J Clin Cell Immunol. 2015;6(2):2. doi:10.4172/2155-9899.1000306 Degirmenci PB, Kirmaz C, Oz D, et al. Allergic rhinitis and its relationship with autoimmune thyroid diseases. Am J Rhinol Allergy. 2015;29(4):257-61. doi:10.2500/ajra.2015.29.4189 Elkarow MH, Hamdy A. A suggested role of human growth hormone in control of the COVID-19 pandemic. Front Endocrinol. 2020;11:569633. doi:10.3389/fendo.2020.569633 Philpott CM, Robinson AM, Murty GE. Nasal pathophysiology and its relationship to the female ovarian hormones. J Otolaryngol Head Neck Surg. 2008;37(4):540-546. Shah S. Hormonal link to autoimmune allergies. ISRN Allergy. 2012;2012:1-5. doi:10.5402%2F2012%2F910437 Dzieciolowska-Baran E, Teul-Swiniarska I, Gawlikowska-Sroka A, Poziomkowska-Gesicka I, Zietek Z. Rhinitis as a cause of respiratory disorders during pregnancy. Adv Exp Med Biol. 2013;755:213-20. doi:10.1007/978-94-007-4546-9_27 Cingi C, Ozdoganoglu T, Songu M. Nasal obstruction as a drug side effect. Ther Adv Respir Dis. 2011;5(3):175-182. doi:10.1177/1753465811403348 UpToDate. Patient education: Nonallergic rhinitis (runny or stuffy nose) (Beyond the Basics). Cleveland Clinic. Surprising relief for your stuffy nose? Have sex. Silvers WS, Poole JA. Exercise-induced rhinitis: A common disorder that adversely affects allergic and nonallergic athletes. Annals of Allergy, Asthma & Immunology. 2006;96(2):334-340. doi:10.1016/s1081-1206(10)61244-6 Sedaghat AR. Chronic rhinosinusitis. Am Fam Physician. 2017 15;96(8):500-506. Smith SR, Montgomery LG, Williams JW. Treatment of mild to moderate sinusitis. Arch Intern Med. 2012;172(6):510-513. doi:10.1001/archinternmed.2012.253 Centers for Disease Control and Prevention. Sinus infection (sinusitis). Sarber KM, Dion GR, Weitzel EK, McMains KC. Approaching chronic sinusitis. South Med J. 2013;106(11):642-648. Georgy MS, Peters AT. Chapter 7: Nasal polyps. Allergy Asthma Proc. 2012;33(3):22-23. doi:10.2500/aap.2012.33.3537 Cedars Sinai. Nasal polyps. ENT Health. Deviated septum. Stanford Medicine. Deviated nasal septum. Penn Medicine. Cerebrospinal fluid leak (CSF leak). National Organization for Rare Disorders. Churg Strauss syndrome. Cleveland Clinic. EGPA: symptoms, causes & treatment. Vasculitis Foundation. Eosinophilic granulomatosis with polyangiitis. Cedars Sinai. Acute bacterial rhinosinusitis. By Kristin Hayes, RN Kristin Hayes, RN, is a registered nurse specializing in ear, nose, and throat disorders for both adults and children. See Our Editorial Process Meet Our Medical Expert Board Share Feedback Was this page helpful? Thanks for your feedback! What is your feedback? Other Helpful Report an Error Submit