Upper airway cough syndrome is a common cause of ongoing cough that starts from problems in the nose, sinuses, or throat. It is often linked to mucus dripping from the back of the nose into the throat, which can irritate the upper airway and trigger coughing.
This condition is commonly associated with allergic rhinitis, non-allergic rhinitis, chronic rhinosinusitis, nasal polyps, and, in children, enlarged adenoids. Symptoms may include a dry or mucus-producing cough, throat clearing, a blocked or runny nose, and a feeling of mucus in the throat.
Treatment depends on the underlying cause and may include nasal sprays, antihistamines, decongestants, saline rinses, or other treatments for sinus or nasal inflammation. A doctor may also check for other common causes of chronic cough, such as asthma or reflux, especially when symptoms do not improve with initial treatment.
Main symptoms
The main symptom of upper airway cough syndrome is a cough that is usually persistent and linked to irritation in the nose, sinuses, or throat.
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Persistent cough
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Throat clearing
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Feeling of mucus dripping down the throat
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Runny nose
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Stuffy nose
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Sneezing
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Itchy nose or throat, especially with allergies
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Hoarseness
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Sore or irritated throat
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Feeling of something stuck in the throat
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Cough that worsens when lying down
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Cough with sinus pressure or facial discomfort, when sinus disease is present
Symptoms can vary depending on the cause. For example, allergies may cause sneezing, itching, and clear nasal drainage, while chronic rhinosinusitis may cause congestion, thick mucus, sinus pressure, and reduced sense of smell.
Possible causes
Upper airway cough syndrome can be caused by:
1. Allergic rhinitis
Allergic rhinitis happens when the nose reacts to allergens such as pollen, dust mites, mold, or pet dander. This can cause swelling inside the nose, extra mucus, sneezing, itching, and a runny or stuffy nose.
The mucus and inflammation can irritate the throat and trigger coughing. In some people, the cough becomes long-lasting because the airway becomes more sensitive over time.
2. Non-allergic rhinitis
Non-allergic rhinitis causes nasal symptoms without a clear allergy trigger. It may be linked to irritants, strong smells, weather changes, smoke, pollution, or other environmental triggers.
This type of rhinitis can cause a stuffy nose, runny nose, postnasal drip, and throat irritation. These symptoms can lead to upper airway cough syndrome, especially when exposure to triggers is frequent.
3. Chronic rhinosinusitis
Chronic rhinosinusitis is long-term inflammation of the nose and sinuses. It can cause nasal congestion, thick mucus, facial pressure, postnasal drip, and cough.
When mucus drains into the throat, it can irritate cough nerves and make the cough reflex more sensitive. Some people with chronic rhinosinusitis may also have nasal polyps, which can worsen blockage and mucus buildup.
4. Nasal polyps
Nasal polyps are soft growths inside the nose or sinuses that are linked to chronic inflammation. They can block airflow, increase congestion, and make sinus drainage worse.
This can contribute to mucus collecting in the back of the nose and throat. As a result, coughing and throat clearing may become more frequent.
5. Enlarged adenoids in children
In children, enlarged adenoids can contribute to upper airway cough syndrome. Adenoids are immune tissue located behind the nose, and when they become enlarged, they can block nasal drainage and airflow.
This may lead to mouth breathing, nasal congestion, mucus drainage, and chronic cough. A doctor may consider this cause when a child has long-lasting cough with nasal symptoms.
Confirming a diagnosis
Diagnosis is usually based on symptoms, medical history, and a physical exam. A doctor may ask about cough duration, nasal congestion, runny nose, allergies, sinus symptoms, throat clearing, reflux symptoms, asthma symptoms, smoking, irritant exposure, and current medications.
Doctors often look for signs that the cough is linked to upper airway disease, such as postnasal drip, nasal swelling, throat irritation, or sinus symptoms. In some cases, an ear, nose, and throat exam, nasal endoscopy, or imaging tests such as CT may be considered, especially if chronic sinus disease or nasal polyps are suspected.
A diagnosis may also be supported when cough improves after treatment directed at the nose, sinuses, or throat. If cough does not improve, doctors may investigate other common causes of chronic cough, including asthma, reflux, chronic bronchitis, medication-related cough, or cough hypersensitivity.
Treatment options
Treatment for upper airway cough syndrome depends on the cause. The goal is to reduce nasal and sinus inflammation, decrease mucus drainage, and calm cough irritation.
1. Nasal corticosteroid sprays
Nasal corticosteroid sprays may be used when inflammation in the nose or sinuses is contributing to symptoms. They can help reduce swelling, congestion, mucus production, and postnasal drip.
These sprays are often used for allergic rhinitis, non-allergic rhinitis, and chronic rhinosinusitis. They may need to be used regularly for best results.
2. Antihistamines and decongestants
Antihistamines can be helpful when allergies are involved. Some guidelines and reviews describe first-generation antihistamines with decongestants as a common trial for upper airway cough syndrome.
Decongestants may help reduce nasal stuffiness in some cases, but they are not suitable for everyone. People with high blood pressure, heart disease, glaucoma, prostate problems, or certain medication use may need medical guidance before using them.
3. Saline nasal rinses
Saline nasal rinses can help clear mucus, allergens, and irritants from the nose. They may be useful for postnasal drip, rhinitis, and chronic sinus symptoms.
These rinses are generally used as a supportive treatment. They may be combined with nasal sprays or other medications when inflammation is present.
4. Treatment for chronic rhinosinusitis
When chronic rhinosinusitis is the cause, treatment may include nasal corticosteroids, saline irrigation, and other therapies based on symptom severity. If bacterial infection is suspected, a doctor may consider antibiotics.
Some people with severe sinus disease, nasal polyps, or symptoms that do not improve with medication may need evaluation by an ear, nose, and throat specialist. Surgery may be considered in selected cases.
5. Cough suppression therapy and trigger control
Some chronic cough guidelines discuss non-drug approaches for cough hypersensitivity. These may include cough control strategies, reducing exposure to triggers, and treating overlapping causes such as reflux or asthma when present.
Trigger control may include avoiding smoke, strong odors, dust, cold air, or other irritants that worsen coughing. This approach is especially useful when the cough reflex remains sensitive.