Question 1

What causes nasal congestion?

Accepted Answer

Nasal congestion is typically caused by inflammation of the nasal lining due to viral infections (such as cold or flu), allergies, sinusitis, irritants (smoke or strong odors), or structural problems like nasal polyps or a deviated septum.
Details from MedlinePlus (NIH, 2023)

Question 2

Can nasal congestion cause dizziness or headaches?

Accepted Answer

Yes. Persistent nasal congestion can affect the pressure in your sinuses and inner ears, potentially leading to headaches or a sensation of dizziness, especially when combined with sinus infections.

Question 3

Is nasal congestion a symptom of COVID-19 or the flu?

Accepted Answer

Yes. Nasal congestion can occur in respiratory infections such as COVID?19 and influenza, often alongside other symptoms like fever, cough, and fatigue—making testing important for accurate diagnosis.
Details from CDC (COVID?19 symptoms, 2025)

Question 4

Why does nasal congestion get worse at night?

Accepted Answer

Congestion often worsens at night due to increased nasal blood flow when lying down, leading to swelling of nasal tissues. Dry air, allergies, or acid reflux can further aggravate nighttime congestion.
Details from MedlinePlus patient info (NIH, 2024)

Question 5

How long does nasal congestion last?

Accepted Answer

Most cases resolve within 7–10 days when caused by a virus. If congestion persists beyond 2 weeks, worsens, or includes other symptoms, it may indicate allergies or sinusitis and should prompt medical evaluation.
Details from MedlinePlus (NIH, 2023)

Question 6

How can I relieve nasal congestion quickly?

Accepted Answer

Effective home remedies include saline nasal rinses, steam inhalation, adequate hydration, and upright positioning. If appropriate, over-the-counter decongestants may help—but should be used according to guidelines.
Details from Mayo Clinic (Cold relief, 2024)

Question 7

What are the best over-the-counter medicines for nasal congestion?

Accepted Answer

Common OTC treatments include nasal sprays like oxymetazoline (short-term use only), oral decongestants such as pseudoephedrine, and antihistamines for allergy-related congestion. Always check for interactions or contraindications.
Details from MedlinePlus (OTC decongestants, 2024)

Question 8

Can allergies cause chronic nasal congestion?

Accepted Answer

Yes. Allergies are a major cause of long-term nasal congestion. Pollen, dust mites, mold, and pet dander can trigger ongoing inflammation in the nasal passages, often requiring antihistamines or allergy-specific treatment.

Question 9

When is nasal congestion considered serious?

Accepted Answer

Nasal congestion may be serious if it lasts more than two weeks, is accompanied by high fever, facial swelling, green discharge, or severe pain. These signs may indicate a bacterial infection or sinus blockage needing medical attention.

Question 10

What is the difference between nasal congestion and a sinus infection?

Accepted Answer

Both involve blocked or stuffy nose, but sinus infection (sinusitis) typically presents with facial pain/pressure, discolored nasal discharge, and sometimes reduced taste or smell. Diagnosis may require a clinician exam or imaging.
Details from MedlinePlus (Sinusitis basics, 2023)

Nasal Congestion Medications