Nasal tests When should we resort to them And what do they reveal

Do you suffer from constant nasal congestion? Chronic nasal discharge? Or have you suddenly lost your sense of smell Don’t ignore these symptoms—they could be signs of chronic inflammation, allergies, or even autoimmune disorders.Nasal tests are not just used to detect infections—they play a key role in uncovering the root cause of persistent nasal issues and guiding your doctor toward the right treatment.In this article from Dalili Medical, we provide a comprehensive guide to nasal analysis, the types of tests available, when you might need them, and what each one reveals about your condition.

✅ When Do You Need a Nasal Test?

Doctors may request nasal tests or examinations in the following cases:

• Persistent nasal congestion or difficulty breathing

• Chronic or purulent nasal discharge

• Foul odor coming from the nose

• Loss or reduction of the sense of smell

• Frequent nosebleeds

• Recurrent sinus infections

• Chronic allergic rhinitis

• Planning for nasal or sinus surgery

• Suspected nasal polyps or foreign objects

 Key Types of Nasal Tests

1. Nasal Swab Culture

The primary test for diagnosing bacterial or viral infections.

• Used to identify the microorganisms causing infection.

• Determines the type of bacteria or fungi to guide antibiotic choice.

• Also used to detect viruses like influenza, RSV, or even COVID-19.

2. Allergy Test (IgE Test – Allergy Panel)

Used to diagnose allergic rhinitis.

• Measures levels of IgE antibodies linked to allergies.

• Identifies allergens such as dust mites, pollen, mold, or pet dander.

• Helps in treatment planning: antihistamines, allergen avoidance, or immunotherapy.

3. Nasal Cytology

Microscopic examination of nasal mucus samples.

• Detects inflammatory cells (e.g., eosinophils in allergies) or pus cells in infections.

• Helps distinguish between allergic and non-allergic rhinitis.

4. Smell Identification Test

For cases of loss or reduction of smell.

• Assesses your ability to identify various odors.

• Commonly used after viral infections, head trauma, or neurological conditions.

• Useful for grading severity and monitoring recovery.

5. Blood Tests Related to Nasal Symptoms

 CBC (Complete Blood Count)

• Detects infections, anemia, or chronic inflammation.

• High white blood cells suggest infection; low counts may indicate immune disorders.

 CRP – ESR

• General markers of inflammation.

• Ordered in chronic sinusitis or facial swelling cases.

 ANA (Antinuclear Antibody Test)

• Used if autoimmune diseases are suspected (e.g., lupus, Wegener’s granulomatosis).

 Additional Examinations Related to Nasal Tests

1. CT Scan of the Sinuses

Imaging that shows sinus inflammation, polyps, or structural blockages.

• Crucial for chronic cases or before surgery.

2. Nasal Endoscopy

Direct visual inspection using a thin flexible tube.

• Helps detect infections, foreign objects, bleeding, or tumors.

3. Skin Prick Allergy Test

Performed by an allergist to identify environmental or food allergens.

• Especially useful in chronic rhinitis or unexplained nasal symptoms.

❓ Why Are Nasal Tests So Important?

Because nasal disorders often share similar symptoms:

Nasal tests help uncover the real cause with precision and speed.

 Tips Before Nasal Testing

• Avoid nasal sprays at least 4 hours before a swab test.

• Inform your doctor if you're using corticosteroids or immunosuppressants.

• Avoid antihistamines for 72 hours before an allergy test.

• Let your doctor know about any past nasal surgeries.

✅ Summary

Nasal testing is not just for detecting infections—it's a powerful tool to diagnose the root causes of nasal congestion, loss of smell, sinus infections, and unusual nasal symptoms.
If your symptoms persist despite treatment, don’t rely on surface-level diagnosis—get the right tests to uncover the real issue and start effective treatment.