Is Post-Nasal Drip Contagious? Causes and Prevention

Is Post-Nasal Drip Contagious?

Post-nasal drip is an uncomfortable condition that makes you feel like you constantly have mucus dripping down the back of your throat. But is post-nasal drip contagious? Can you catch it from someone else?

Post-nasal drip itself is not contagious. However, some of the underlying causes of post-nasal drip like colds, flu, and sinus infections are contagious. This article will cover the details on post-nasal drip contagiousness and how to manage this irritating symptom.

What is Post-Nasal Drip?

Post-nasal drip describes mucus drainage from the sinuses down the back of the throat. It can feel like you have a drippy nose in the throat!

When working properly, the nasal and sinus cavities continually produce mucus to trap dust, germs, and other particles before they reach the lungs. Tiny hair-like projections called cilia sweep the mucus backward into the throat where it is swallowed.

With post-nasal drip, your body produces excess mucus or the mucus becomes very thick and sticky. This mucus accumulates in the throat or drips down from the nasal cavities, causing feelings of constant drainage.

What Causes Post-Nasal Drip?

Post-nasal drip has several possible underlying causes:

• Allergies - allergic rhinitis
• Common cold
• Flu
• Sinusitis
• Vasomotor rhinitis
• Environmental irritants
• Dry air
• Smoking
• Pregnancy hormones
• Acid reflux
• Certain medications

Is Post-Nasal Drip Itself Contagious?

Post-nasal drip on its own is not contagious. You cannot directly catch post-nasal drip or spread it to others.

However, some of the conditions that cause post-nasal drip like colds, flu, and certain types of sinusitis are contagious illnesses. So post-nasal drip may be a symptom of an underlying contagious disease.

Contagious Causes of Post-Nasal Drip

Here are some contagious conditions that can lead to post-nasal drip:

Common Cold

Colds are mild viral infections of the nose and throat that are highly contagious. The viruses that cause colds spread through respiratory droplets from coughing, sneezing, and close contact.

During a cold, the nasal membranes become swollen, inflamed, and overloaded with mucus. This excess nasal mucus drips down the throat, leading to post-nasal drip.

Flu

The flu is a more severe respiratory viral infection. Like colds, the flu virus spreads via respiratory droplets and causes inflammation in the nasal cavities.

Flu often triggers copious amounts of nasal mucus discharge. This excess mucus running down the back of the throat is perceived as post-nasal drip.

Sinusitis

Sinusitis refers to inflammation of the sinus cavities, usually due to a viral, bacterial, or fungal infection. The sinuses produce abundant thick mucus when infected.

Sinusitis can be contagious depending on the cause. Bacterial and fungal sinusitis may be transmissible in some cases, while chronic sinusitis is generally not contagious.

The mucus from the inflamed sinuses often drains into the throat, leading to the feeling of post-nasal drip.

Strep Throat

Strep throat is a bacterial throat infection caused by group A streptococcus bacteria. It spreads easily through respiratory droplets.

Along with throat pain, strep throat can also cause excess mucus production that leads to post-nasal drip in some cases.

Non-Contagious Causes

Some common causes of post-nasal drip like allergies, dry air, and reflux are not contagious:

• Allergic rhinitis
• Vasomotor rhinitis
• Respiratory irritants like smoke
• Dry air
• Pregnancy hormones
• Acid reflux
• Medication side effects

These non-infectious triggers lead to chronic inflammation and irritation in the nasal passages and sinuses, causing ongoing post-nasal drip.

Is Post-Nasal Drip Spread Through Kissing or Sharing Drinks?

Since post-nasal drip itself is not contagious, you cannot get it directly through kissing or sharing drinks with someone who has it.

However, some of the underlying contagious conditions like colds and flu can be passed through saliva contact and shared utensils. So it's best to avoid close contact and sharing drinks when someone has an active respiratory infection.

Treating Post-Nasal Drip

Post-nasal drip often resolves once the underlying condition improves. Here are some treatment options:

• Decongestants reduce swollen tissues
• Antihistamines help allergic post-nasal drip
• Nasal irrigation with saltwater
• Nasal corticosteroid spray
• Antibiotics for bacterial sinusitis
• Over-the-counter cough drops
• Rest and hydration

If post-nasal drip persists, see an ENT doctor to identify the cause and discuss long-term treatment options.

When to See a Doctor

Seek medical advice if you experience:

• Severe headache
• Facial pain or pressure
• Swollen eyelids
• Green or yellow nasal discharge
• Fever over 101°F (38°C)
• Post-nasal drip lasting over a month

This could indicate a sinus infection, allergies, or other condition needing treatment.

Preventing Post-Nasal Drip

You can reduce post-nasal drip episodes by:

• Avoiding sick contacts
• Washing hands frequently
• Not sharing food or drinks
• Treating allergies
• Using a humidifier
• Not smoking

Practice healthy habits to prevent contagious illnesses that could lead to post-nasal drip. See your doctor regularly so conditions causing chronic post-nasal drip can be diagnosed and managed.

The Bottom Line

Post-nasal drip itself is not contagious. But some infectious causes like colds, flu, sinusitis, and strep throat are contagious. Work to minimize contact with anyone actively sick. Use proper hygiene practices to avoid contracting and passing contagious illnesses associated with post-nasal drip.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before starting any new treatment regimen.