Introduction

Have you ever wondered why your stuffy nose just won't clear up? Or maybe you've noticed those strange, fleshy growths in your nasal passages. If so, you're not alone. 

Nasal polyps and sinusitis often coexist. The prevalence of chronic sinusitis with nasal polyp formation is 1–2.6% in the global population.¹ But what exactly is the connection between these two conditions? 

This article will focus on a comprehensive understanding the connection of sinusitis and nasal polyps by presenting the available treatment options.

What is sinusitis?

The swelling or inflammation of the tissue lining your sinuses (the air-filled structures located inside your face) is known as sinusitis.²

Types of sinusitis

The types are classified according to the duration of ongoing symptoms and the causes, as follows:²

Acute sinusitis

It is characterised by:²

• Symptoms take place in less than four weeks
• It is often caused by viruses such as the common cold

Subacute sinusitis

The patient has had the symptoms for longer than four weeks but shorter than twelve weeks.²

Chronic sinusitis

It is as follows:²

• The symptoms occur in 12 weeks or more
• It usually happens due to bacteria

Recurrent acute sinusitis

It occurs multiple times in a year, each time lasting less than 2 weeks.²

Causes of sinusitis

Viral and bacterial sinusitis

Just like the common cold, most forms of sinusitis are caused by viruses. Either you get infected by bacteria after a viral episode of sinusitis, or bacteria themselves cause sinusitis. 

You may have bacterial sinusitis if your runny nose, stuffy nose, and facial pain do not get better in 10 days. Your symptoms may briefly get better before worsening again. 

Fungus-induced sinusitis

Fungus-induced sinus infections are the more serious kinds of sinusitis. You can only develop this if you have a compromised immune system.

Risk factors of sinusitis 

The following factors may make sinusitis more likely to occur:⁴

• Hay fever or any other sinus-related allergy
• A common cold that causes sinus congestion
• An issue inside the nose, including a tumour, nasal polyps, or a crooked nasal septum
• An illness like HIV/AIDS or a disease of the immune system like cystic fibrosis
• Secondhand smoke is the smoke you inhale from smoking or from being around smokers

Symptoms of sinusitis

Sinusitis frequently follows a cold or the flu.³

Sinusitis's primary symptoms include:³

• Discomfort, oedema, and soreness around your eyes, forehead, or cheeks
• A runny or obstructed nose
• A diminished ability to smell
• Mucus from your nose that's green or yellow
• Elevated body temperature

Additional signs and symptoms consist of:³

• Headache
• Toothache
• Foul breath
• Cough
• Sensation of ear pressure

Additionally, you might sound nasal when speaking and snore at night.³

What are nasal polyps?

Nasal polyps are soft, painless, noncancerous growths. They originate from the mucosa, which is a thin, soft tissue lining your sinus and nasal passages. They usually occur on both sides of your nose. If nasal polyps become inflamed and swollen, they may block your airflow through your nose.⁵

Small polyps assume the shape of a teardrop. However, with increased size, they generally assume the appearance of peeled grapes that are pink, yellow, or grey in colour.⁵

Causes and risk factors

The origin of nasal polyps is unknown to experts. It is also unknown why some people develop nasal polyps while others do not.⁶

Risk factors

Nasal polyps might be more common in a person who suffers from allergies, infections, or any other disease that results in continuous inflammation of the sinuses and nose.⁶

An illness which is commonly linked with nasal polyps includes: ⁶

• Asthma
• Sensitivity to aspirin
• Cystic fibrosis
• Dental infections
• Lack of vitamin D

If you have a family history of nasal polyps that may also increase the risk.

Symptoms of nasal polyps

It is possible that small polyps in your nose may not even cause symptoms. However, if they grow, you may become:⁵

• Stuffy nose, or congestion in the nose
• Runny nose, or rhinorrhea
• Headaches
• Loss of smell and taste
• Nosebleeds
• Nasal dripping
• Sinus pressure
• Snoring

If polyps increase in size, they may block your sinuses and nasal passages and lead to:

• Repeated bouts of asthma (in asthmatic patients), leading to difficulty breathing
• Sinusitis, or repeated sinus infection
• Different types of sleeping disorders, such as sleep apnoea

How are sinusitis and nasal polyps connected?

Chronic sinusitis and nasal polyps, being interconnected entities, often occur together, giving rise to a complex and chronic inflammatory disease of the paranasal sinuses, which is known as chronic rhinosinusitis with nasal polyps (CRSwNP).¹⁾

Chronic inflammation as a common link

Both chronic sinusitis and nasal polyps signify a condition of chronic inflammation of the nasal mucosa and the sinuses. 

The chronic inflammation results from the body's immune response, releasing certain proteins, such as:

• Cytokines such as IL-4, IL-5, and IL-13
• Chemokines like CCL24 and CCL26

Serving as messengers and signalling for the immune response to continue fighting, causing swelling and irritation. 

How do nasal polyps contribute to the development of sinusitis?

Nasal polyps have a role in causing sinusitis by the following:

• Large nasal polyps can obstruct sinus openings, causing insufficient mucus drainage, leading to a warm, moist environment prone to bacterial and fungal growth, causing sinus infections
• Nasal polyps inflammation in the nasal passages and sinuses causes swelling, impaired cilia function, and increased sinusitis risk due to impaired mucus clearance
• Nasal polyps increase mucus production, potentially trapping excess mucus, leading to pathogen multiplication and sinusitis development due to its potential for infection

How sinusitis may worsen the condition of nasal polyps?

By the following:

• Chronic sinusitis infections can cause inflammation in the nose lining, leading to the formation of new or existing polyps
• Sinusitis triggers an inflammatory cascade, causing inflammation and swelling in the nasal lining, making it more susceptible to polyp formation
• Chronic sinusitis may cause mechanical stress on sinus tissues, leading to the body's attempt to produce polyps as a defence mechanism, causing sinusitis and nasal obstruction

Diagnosis of sinusitis and nasal polyps

The diagnosis is made by a combination of all three: clinical evaluation, imaging studies, and sometimes laboratory tests.¹

Clinical evaluation

Clinical diagnosis begins with a thorough history and physical examination of a patient for symptoms such as nasal congestion, nasal discharge, facial pain, anosmia (loss of smell), and post-nasal drip.

The doctors use a nasal endoscope to visualise the nasal passages for the occurring polyps and the extent of inflammation or blockage.

Imaging studies

In order to confirm the diagnosis and arrange surgical procedures, CT scans assess the severity of sinus disease, spot anatomic variations, and provide specifics on inflammation and polyposis.

Allergy and immune tests

Some of the factors contributing to the condition include allergies or immune system disorders, which may be diagnosed through blood tests or allergy testing to identify potential allergens.

Olfactory testing

Testing of olfaction can be done in case of complaints of anosmia to find out the degree of olfactory impairment, as is usually seen in patients with nasal polyps.

Biopsy

A biopsy of the nasal polyps should be considered in rare instances when it needs to rule out other conditions, especially if the polyps are unilateral, appear atypically, or are related to bleeding.

Diagnosing the disorder helps in the selection of the best method of treatment according to the degree and underlying causes.

Management

Treatment of chronic sinusitis with nasal polyps include:¹

Medical treatments

Intranasal Corticosteroids (ICS)

These are considered first-line treatments, which reduce inflammation, shrink the size of the polyp, and decrease nasal congestion symptoms. The administration on a regular basis could improve the patient's quality of life.

Oral corticosteroids (OCS)

Some have been prescribed for short-term courses to reduce the size of polyps quickly and to keep symptoms under control. However, due to side effects, their use is usually with caution and just for flare-ups.

Antibiotics

These may be used when there is a suspicion or confirmation of bacterial infection. Often these are combined with corticosteroids in an attempt to help reduce inflammation while treating the infection.

Nasal saline irrigations

Regular nasal saline irrigation will help clear the mucus and allergens, keep the nasal passages moist, and reduce irritation and symptoms.

Surgical interventions

Endoscopic sinus surgery

Advised for patients not responding properly to the medical treatment. This is a less-invasive surgical procedure that removes nasal polyps and clears blocked sinuses, thus improving airflow and promoting drainage. Because recurrence of polyps is common, surgery may need to be repeated several times.

The aims of treatment are the reduction of symptoms, prevention of complications, and enhancement in quality of life among patients. It is recommended to seek medical advice from professionals.

FAQ’s

What happens if nasal polyps go untreated?

Nasal polyps, while not posing a significant threat to life, can grow into serious health issues if not treated due to their continuous obstruction of airways.

How can I make sinusitis go away?

Mild sinusitis can be treated without a doctor's visit, by resting, consuming liquids, using analgesics, avoiding allergies, smoking, and cleaning the nose with salt water.

Summary

The article shows deep understanding and proper insight into two of the most prevalent conditions—sinusitis and nasal polyps-—that in the majority of patients appear to be combined, with very serious effects on the quality of their lives. 

Sinusitis can be regarded as an inflammation of the sinuses and is categorised into acute, subacute, and chronic types. For both diseases, causes have been described, including viral infections, allergies, and structural abnormalities; the symptoms and risk factors are also identified. These are soft growths found in the nasal passage and are a contributor to sinusitis because of blockage of drainage and bacterial growth. Conversely, sinusitis may exacerbate the polyps.