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Runny or Blocked Nose: Causes and Management

Key takeaways

  • A runny or blocked nose can result from allergies, infections, sinus inflammation, environmental irritants, or structural nasal issues, with common symptoms like nasal congestion, nasal discharge, sneezing, post-nasal drip, facial pressure, and reduced sense of smell.
  • The underlying cause of the condition may vary based on factors like the duration of symptoms, the presence of infection, allergic triggers, or nasal anatomy.
  • Evaluation involves a clinical assessment to determine if symptoms are related to conditions like allergic rhinitis, sinusitis, viral infections, or nasal blockages due to structural factors.
  • Management depends on the underlying cause and severity of symptoms, and may include medications, nasal sprays, saline irrigation, and other supportive measures.
  • Assessment by an ENT specialist may be needed if symptoms persist, recur, or affect daily life.
View the full summary text

A runny or blocked nose is a common condition that can result from allergies, infections, sinus inflammation, environmental irritants, or structural nasal issues. Symptoms typically include nasal congestion, nasal discharge, sneezing, post-nasal drip, facial pressure, and a reduced sense of smell.

The cause of the condition varies depending on factors such as the duration of symptoms, the presence of infection, allergic triggers, or anatomical issues with the nose. Clinical evaluation helps determine whether symptoms are related to conditions like allergic rhinitis, sinusitis, viral infections, or structural blockages.

Management of a runny or blocked nose depends on identifying the cause and severity of the symptoms. Treatments may include medications, nasal sprays, saline irrigation, and other supportive measures. If symptoms persist, recur, or affect daily life, further evaluation by an ENT specialist may be needed.

This summary is for general education and does not replace personalised medical advice.

Why do I get a runny nose? 

A runny nose is one of the most common ENT symptoms we see. It is characterised by mucus dripping from the nose. Did you know that mucus is not necessarily a bad thing, and does not always signify that you are sick? In fact, mucus is actually a protective substance produced by the mucous membrane to moisten the air you breathe. It also acts as a barrier to prevent dust, bacteria and pollen from entering your lungs. 

You might not notice it, but your nose produces mucus everyday. It doesn’t drip because it mixes with saliva and goes down the back of your throat, but when it does, it’s because of excess mucus used by irritation or inflammation in the nasal passage. 

Because a runny nose is so generalised, it can mean many things. In ENT, a runny nose is commonly caused by: 

  1. Allergic Rhinitis 
  2. Sinusitis  
  3. Deviated nasal septum

To find out if you have any of the above conditions, Dr Dennis Chua will have to run some tests. 

ENT Specialist — Singapore

If you have questions or concerns about your ears, nose, and throat, you may book a consultation with Dr Dennis Chua, an ENT specialist in Singapore. He has completed his training in otorhinolaryngology locally and attained qualifications internationally.

Local Training International Qualifications Otorhinolaryngology

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Why do I get a blocked nose?

A blocked or stuffy nose is also another common ENT symptom and can mean several things. With a blocked nose, you may feel like you have difficulty breathing on one side of your nose, your nose drips and no mucus comes out when you try to blow your nose. Often, patients think that a blocked nose is due to too much mucus, but it’s actually caused by inflamed blood vessels in the sinuses triggered by a cold, allergies or a sinus infection. Sometimes, difficulty breathing through the nose could also be a sign of a deviated nasal septum, which increases your risk of sinus infections. 

A deviated nasal septum may also be associated with other conditions like obstructive sleep apnea and epistaxis. 

Little girl blowing nose-

ENT Specialist · Facial Plastic Surgeon

Dr. Dennis Chua

BOARD CERTIFICATION
Double Board Certified Facial Plastic & Reconstructive Surgeon (International & European Boards – IBCFPRS & EBCFPRS)

Qualifications

Years experience
0
Awards received
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Global

Conference speaker

A highly regarded ENT specialist with a fellowship at the University of Virginia under Professor Stephen Park (Past President, American Academy of Facial Plastics & Reconstructive Surgery). Previously Chief of Facial Plastics & Reconstructive Service at Tan Tock Seng Hospital and Honorary Secretary of the Singapore Society of Otolaryngology.

Trained in Da Vinci robotic ENT surgery in South Korea and serves as ENT Lead Tutor at Lee Kong Chian School of Medicine. Has presented at international conferences across America, China, Europe, and Southeast Asia.

Notable awards

2013 Health Manpower Development Award — Ministry of Health
2011 Service with a Heart Award
2009 Singhealth Best Doctor Award
2009 Best Oral Presentation, Singapore–Malaysia ENT Meeting
2005 Best ENT Free Paper — 11th ASEAN ORL Head & Neck Congress

Areas of focus