Postnasal Drip Vector

Postnasal Drip: Causes, Symptoms, and Treatments (2024)

by | Updated: Apr 28, 2024

Postnasal drip, a common condition characterized by excess mucus accumulation in the back of the throat or nose, can be both bothersome and perplexing.

This condition, often a symptom of various underlying issues, ranges from allergies to infections, and can significantly impact one’s quality of life.

Understanding its causes, recognizing the symptoms, and exploring effective treatment options are essential for managing this condition.

This article provides a comprehensive overview of postnasal drip to help you better understand and address this ailment.

What is Postnasal Drip?

Postnasal drip is a condition where excess mucus builds up in the back of the nose and throat, leading to symptoms like a constant need to clear the throat, coughing, and sore throat. It’s often caused by allergies, infections, or environmental irritants.

Postnasal Drip Vector Illustration


Postnasal drip can be caused by a variety of factors, each contributing to the excessive production or altered consistency of mucus in the nasal passages and throat.

Here are some of the primary causes:

  • Allergies: Allergic reactions, particularly due to pollen, dust, mold, or pet dander, can lead to postnasal drip. Allergens trigger the release of histamine, which increases mucus production as part of the body’s defense mechanism.
  • Colds and Flu: Viral infections like the common cold and influenza can cause postnasal drip. These illnesses increase mucus production as the body attempts to fight off the virus.
  • Sinus Infections (Sinusitis): Both acute and chronic sinusitis, which involve inflammation of the sinuses, can lead to postnasal drip.
  • Pregnancy: Hormonal changes during pregnancy can increase the production of mucus, resulting in postnasal drip.
  • Gastroesophageal Reflux Disease (GERD): This condition, in which stomach acid flows back into the esophagus, can lead to throat irritation and increased mucus production.
  • Certain Medications: Some medications, including birth control pills and blood pressure medications, can cause postnasal drip as a side effect.
  • Weather Changes: Changes in weather, particularly dry or cold air, can affect mucus production and consistency, leading to postnasal drip.
  • Environmental Irritants: Exposure to irritants like smoke, perfumes, chemicals, or pollution can trigger the production of excess mucus.
  • Dehydration: Not drinking enough fluids can lead to thickened mucus, making it harder to clear from the throat and nasal passages.
  • Certain Foods and Spices: For some people, eating spicy or hot foods can trigger mucus production and postnasal drip.
  • Structural Issues: Anatomical issues like a deviated septum can impede proper mucus drainage, leading to accumulation and postnasal drip.
  • Foreign Bodies: In rare cases, especially in children, a foreign body lodged in the nose can cause persistent postnasal drip.

Note: It’s important to identify the specific cause of postnasal drip in each individual, as the treatment may vary depending on the underlying reason. A healthcare provider can help in diagnosing the cause and suggesting appropriate treatments.


The symptoms of postnasal drip can vary depending on the underlying cause, but there are several common signs that are generally associated with this condition.

Common symptoms of postnasal drip include:

  • Feeling of Mucus in the Throat: One of the most common symptoms is the sensation of mucus accumulating or dripping down the back of the throat.
  • Frequent Swallowing: Due to the excess mucus, individuals may find themselves swallowing more often.
  • Sore Throat: The constant irritation from the mucus can lead to a persistent sore throat.
  • Cough: Especially noticeable at night or first thing in the morning, a cough due to postnasal drip can be chronic and lingering.
  • Hoarseness: Voice changes or hoarseness can occur if the throat and vocal cords become irritated.
  • Bad Breath (Halitosis): The presence of excess mucus can lead to bad breath.
  • Nausea: In some cases, especially when a significant amount of mucus is swallowed, nausea can occur.
  • Difficulty Breathing: While not as common, some individuals may experience difficulty breathing or shortness of breath if the mucus is particularly thick or abundant.
  • Ear Pain or Fullness: Eustachian tube dysfunction, caused by the excess mucus, can lead to a feeling of fullness or pain in the ears.
  • Sinus Pressure or Pain: Accumulation of mucus can lead to pressure or pain in the sinus areas.

Note: These symptoms can also be indicative of other conditions, so it’s crucial to consult with a healthcare professional for an accurate diagnosis. In some cases, postnasal drip is a symptom of a more serious condition that may require specific treatment.


Diagnosing postnasal drip often begins with a thorough medical history and physical examination by a healthcare professional.

During the consultation, the doctor will inquire about the patient’s symptoms, their duration, and any potential triggers or related conditions, such as allergies or recent respiratory infections.

A physical exam typically includes checking the nasal passages, throat, and ears for signs of inflammation or infection. In some cases, further diagnostic tests may be necessary.

These can include allergy testing to identify specific allergens, a nasal endoscopy for a closer examination of the nasal passages and sinuses, or imaging tests like X-rays or CT scans to assess sinus health.

For suspected cases of gastroesophageal reflux disease (GERD) contributing to postnasal drip, a pH monitoring test of the esophagus may be recommended.

The diagnosis is guided by the combination of clinical evaluation and, if necessary, these specialized tests.


The outlook for individuals with postnasal drip largely depends on the underlying cause of the condition.

In most cases, postnasal drip is a manageable symptom and often resolves either on its own or with appropriate treatment:

  • Allergy-Induced Postnasal Drip: When allergies are the cause, managing the allergies through avoidance of triggers, antihistamines, or allergy shots can significantly improve symptoms. The outlook is generally very good with proper management.
  • Postnasal Drip from Infections: For postnasal drip caused by infections like the common cold or flu, the condition usually resolves as the infection clears up. Sinus infections may require antibiotics if they are bacterial, and the prognosis with treatment is typically positive.
  • Chronic Conditions: In cases where postnasal drip is due to chronic conditions like GERD or chronic sinusitis, the outlook depends on the management of the underlying condition. Consistent treatment and lifestyle changes can often control symptoms effectively.
  • Medication-Induced Postnasal Drip: If a medication is causing postnasal drip, the outlook is good once the medication is changed or discontinued, under a doctor’s supervision.
  • Environmental Factors: When caused by environmental irritants, the prognosis is good if the irritant can be identified and avoided.
  • Structural Issues: For structural causes, such as a deviated septum, surgical intervention may be necessary for significant improvement. The outlook post-surgery is generally positive.

In general, the long-term outlook for postnasal drip is favorable, especially when the underlying cause is identified and adequately addressed.

It’s important to consult with healthcare professionals for a proper diagnosis and treatment plan.

For most people, postnasal drip is a temporary or controllable condition rather than a chronic or serious health concern.

Treatment for Postnasal Drip

Medical treatments for postnasal drip vary depending on the underlying cause of the condition.

These treatments are designed to reduce mucus production, alleviate symptoms, and address specific causes:

  • Antihistamines: If allergies are the cause of postnasal drip, antihistamines can be effective in reducing mucus production and relieving symptoms.
  • Decongestants: These medications help reduce nasal congestion and can alleviate the pressure and discomfort associated with postnasal drip. However, they should be used cautiously and for short durations to avoid rebound congestion.
  • Nasal Steroid Sprays: These sprays reduce inflammation in the nasal passages and can be very effective for treating postnasal drip, especially when it’s due to allergic reactions or chronic sinusitis.
  • Antibiotics: If a bacterial infection, such as bacterial sinusitis, is the cause, antibiotics may be prescribed. However, they are not effective against viral infections like the common cold.
  • Mucus-Modifying Medications: Medications like guaifenesin can help thin the mucus, making it easier to clear from the nasal passages and throat.
  • GERD Medications: For postnasal drip caused by gastroesophageal reflux disease, antacids, H2 blockers, or proton pump inhibitors might be prescribed to reduce stomach acid and prevent reflux.
  • Avoiding Certain Medications: If certain medications are causing postnasal drip as a side effect, your doctor may suggest alternatives.
  • Surgery: In rare cases, particularly when structural issues like a deviated septum are causing postnasal drip, surgical intervention might be considered.

It’s essential for individuals experiencing postnasal drip to consult with a healthcare professional. A doctor can determine the underlying cause of the condition and recommend the most appropriate treatment.

Additionally, some treatments may have side effects or interact with other medications, so professional guidance is crucial.

Home Remedies

There are several home remedies that can be effective in managing the symptoms of postnasal drip.

These remedies focus on thinning the mucus, reducing irritation, and alleviating the discomfort associated with this condition:

  • Stay Hydrated: Drinking plenty of fluids can help thin the mucus, making it easier to expel. Water, herbal teas, and broth are good choices.
  • Use a Humidifier: Adding moisture to the air with a humidifier can help soothe irritated nasal passages and throat, and also helps in loosening mucus.
  • Saline Nasal Spray: Regular use of a saline nasal spray can help keep the nasal passages moist and aid in clearing out mucus.
  • Steam Inhalation: Breathing in steam, such as from a hot shower or a bowl of hot water, can help loosen mucus in the nasal passages.
  • Gargling with Salt Water: Gargling with warm salt water can help soothe a sore throat and may help to clear mucus.
  • Elevate the Head During Sleep: Sleeping with the head elevated can prevent mucus from accumulating in the throat overnight.
  • Avoid Irritants: Reducing exposure to irritants such as cigarette smoke, strong odors, and pollution can prevent further irritation of the nasal passages and throat.
  • Stay Away from Dehydrating Substances: Avoiding alcohol and caffeine, which can lead to dehydration, might also be beneficial.
  • Nasal Irrigation: Using a neti pot or a similar device for nasal irrigation with a saline solution can help clear the nasal passages of mucus.

Remember: While these home treatments can provide relief, they may not address the underlying cause of postnasal drip. If symptoms persist or worsen, it’s advisable to seek medical advice for a more targeted treatment approach.

FAQs About Postnasal Drip

Can Mucus Cause a Sore Throat?

Yes, mucus can cause a sore throat. This condition often arises when mucus drains from the nasal cavity into the throat, a process known as postnasal drip.

Postnasal drip can irritate the throat, leading to symptoms such as soreness, itchiness, or a scratchy feeling. This irritation can be caused by various factors, including allergies, colds, flu, sinus infections, or changes in weather.

The continuous dripping of mucus can inflame and irritate the throat lining, making it feel sore.

Managing the underlying cause of the mucus overproduction and ensuring good hydration can help alleviate the soreness.

What Does Postnasal Drip Feel Like?

Postnasal drip typically feels like a constant trickle or accumulation of mucus in the back of the throat. This sensation often leads to frequent swallowing, throat clearing, and can be accompanied by a persistent cough or sore throat.

Some individuals may also experience a hoarse voice or a tickling sensation in the throat.

Is Postnasal Drip Contagious?

Postnasal drip itself is not contagious. However, if it’s caused by a viral or bacterial infection, such as the common cold or sinusitis, the infection could be contagious.

The postnasal drip is a symptom of the underlying condition, not a contagious ailment on its own.

What Allergies Can Cause Postnasal Drip?

Various allergies can lead to postnasal drip, including seasonal allergies (such as pollen from trees, grasses, and weeds), indoor allergens (like dust mites, pet dander, and mold), and sometimes certain foods.

These allergens trigger a reaction in the immune system, resulting in the production of excess mucus as a defense mechanism.

What Foods Should You Avoid with Postnasal Drip?

When experiencing postnasal drip, it’s advisable to avoid foods that can exacerbate mucus production. These include dairy products, which some people find to thicken mucus, spicy foods that can irritate the throat, and foods high in sugar.

Additionally, caffeine and alcohol can dehydrate the body and potentially worsen symptoms. Hydration is key, so focusing on consuming fluids and foods that are hydrating can be beneficial.

Can You Have Postnasal Drip Without Congestion?

Yes, it is possible to experience postnasal drip without having nasal congestion. While these two symptoms often occur together, especially in cases like colds or allergies, postnasal drip can occur independently.

This can happen when mucus production is increased or its consistency is altered without significant nasal obstruction or congestion.

How to Prevent Postnasal Drip?

Preventing postnasal drip involves addressing its potential causes: maintaining good hydration, using a humidifier to keep air moist, avoiding known allergens, and practicing good hygiene to prevent infections.

For those prone to allergic postnasal drip, using air purifiers and regular cleaning to reduce allergens can be helpful. Avoiding irritants like smoke and strong odors is also beneficial.

For people with GERD, managing acid reflux through diet and medication can prevent postnasal drip symptoms.

What Worsens Postnasal Drip?

Certain factors can worsen postnasal drip, including exposure to allergens (pollen, dust, pet dander), irritants like smoke and pollution, cold and dry air, and dehydration.

Consuming foods and beverages that lead to mucus thickening, such as dairy products, caffeine, and alcohol, can also exacerbate the condition.

Additionally, lying down or sleeping can worsen the sensation of mucus in the throat due to gravitational effects.

Does Postnasal Drip Cause Nausea?

Postnasal drip can cause nausea in some individuals, especially when a significant amount of mucus drains into the stomach. This can be particularly noticeable in the morning after a night’s accumulation.

The constant swallowing of mucus can irritate the stomach lining and lead to feelings of queasiness or discomfort.

Does Postnasal Drip Cause Tonsil Stones?

Postnasal drip can contribute to the formation of tonsil stones (tonsilloliths). The excess mucus provides additional material that can accumulate in the crevices of the tonsils.

Along with bacteria, food particles, and dead cells, this can lead to the formation of these small, odorous stones. Individuals with chronic postnasal drip may be more prone to developing tonsil stones.

Can Postnasal Drip Cause Shortness of Breath?

While less common, postnasal drip can sometimes lead to shortness of breath. This typically occurs if the mucus is excessively thick or abundant, potentially causing difficulty in breathing, especially if it triggers coughing or affects the airway.

Additionally, if postnasal drip is a symptom of an underlying respiratory condition, such as severe allergies or a sinus infection, these conditions themselves can contribute to breathing difficulties.

Can Postnasal Drip Cause Mucus in the Lungs?

Postnasal drip primarily affects the throat and can lead to coughing, but it does not directly cause mucus to form in the lungs.

However, if postnasal drip is part of a broader respiratory condition, such as a cold, flu, or sinus infection, it can contribute to or exacerbate the production of mucus in the lungs indirectly.

This happens as the body’s immune response to the infection increases mucus production throughout the respiratory system, including the lungs.

When to See a Doctor for Postnasal Drip?

It’s advisable to see a doctor for postnasal drip if the symptoms are severe, persistent, or worsening.

If there are accompanying symptoms like high fever, difficulty breathing, wheezing, or if the mucus is colored (yellow, green, or blood-tinged), medical attention is recommended.

Additionally, if over-the-counter treatments and home remedies do not alleviate the symptoms, or if there is a suspicion of an underlying condition like a bacterial infection or GERD, a healthcare professional’s evaluation is crucial.

Final Thoughts

Postnasal drip is a multifaceted condition with a spectrum of potential causes and varying symptoms. Its impact on daily life can range from mildly irritating to severely debilitating.

Effective management relies on accurately identifying the underlying cause and implementing appropriate treatments, which may include medications, home remedies, or lifestyle changes.

As with any health condition, consultation with healthcare professionals is crucial for a tailored approach. Understanding postnasal drip is the first step towards alleviating its symptoms and improving overall well-being.

John Landry, BS, RRT

Written by:

John Landry, BS, RRT

John Landry is a registered respiratory therapist from Memphis, TN, and has a bachelor's degree in kinesiology. He enjoys using evidence-based research to help others breathe easier and live a healthier life.