Nasal obstruction refers to a blockage or restriction of airflow through the nasal passages. It can occur due to various reasons, and it may be a temporary or chronic condition. Some common causes of nasal obstruction include:

• Nasal Congestion: Swelling of the nasal tissues due to inflammation, often caused by infections like the common cold or flu, allergies, or irritants.
• Deviated Septum: The septum is the wall of cartilage and bone that separates the two nasal passages. A deviated septum occurs when the septum is displaced to one side, causing one nasal passage to be smaller than the other.
• Nasal Polyps: Soft, non-cancerous growths on the lining of the nasal passages or sinuses. They can obstruct the nasal passages and cause difficulty breathing.
• Enlarged Adenoids or Tonsils: In children, enlarged adenoids or tonsils can lead to nasal obstruction. This is more common in cases of chronic tonsillitis or adenoiditis.
• Sinusitis: Inflammation of the sinuses can cause nasal congestion and obstruction. Chronic sinusitis may result in long-term nasal issues.
• Allergic Rhinitis: An allergic reaction to airborne allergens, such as pollen, dust mites, or pet dander, can lead to nasal congestion.
• Nasal Trauma: Injuries to the nose or nasal passages, such as a broken nose, can cause obstruction.
• Tumors: Though less common, tumors in the nasal passages or sinuses can cause blockage and nasal obstruction.

Symptoms of nasal obstruction may include difficulty breathing through the nose, snoring, frequent nosebleeds, and a reduced sense of smell. Treatment options depend on the underlying cause and may include medications (like decongestants, antihistamines, or nasal steroids), lifestyle changes, surgical procedures (such as septoplasty or polypectomy), or a combination of these approaches.

If you are experiencing persistent or severe nasal obstruction, it is advisable to consult with a healthcare professional for a proper diagnosis and appropriate treatment.