Nasal congestion, also known as a stuffy or blocked nose, occurs when the tissues lining the inside of your nose become swollen and inflamed. This swelling can be caused by a variety of factors, including:

• Illnesses: The common cold, flu, and sinus infections can all cause nasal congestion.

• Allergies: Allergic rhinitis, caused by an inflammatory reaction to environmental allergens such as pollen, dust mites, and animal dander, can also lead to nasal congestion.

• Environmental factors: Exposure to irritants such as smoke, pollution, and chemical fumes can cause nasal congestion.

• Structural issues: Structural issues such as a deviated septum, nasal polyps, or enlarged adenoids can also cause nasal congestion.

Nasal congestion typically clears up on its own within a week, but if it lasts for a week or more, it may be a sign of an infection or underlying health issue. Treatment options for nasal congestion include over-the-counter decongestants, nasal sprays, and home remedies such as steam inhalation and saline nasal rinses. If nasal congestion is caused by an underlying health issue, such as allergies or sinusitis, treating the underlying condition can help alleviate the congestion.