Nasal obstructions refer to blockages in the nasal passages that can make it difficult to breathe through the nose. Common causes include allergies, sinus infections, and deviated septum. These conditions can lead to symptoms such as congestion, difficulty smelling, and snoring. Treatment for nasal obstructions often depends on the underlying cause. Over-the-counter medications like decongestants and antihistamines can help relieve symptoms. In some cases, medical procedures or surgery may be necessary to correct structural issues or remove obstructions, improving airflow and overall nasal function.