What are Nasal Polyps? Nasal polyps block the flow of air through the nose. As a result, nasal congestion occurs. Nasal polyps do not go away on their own after they form. Depending on whether there is another accompanying disease, it may cause discomfort such as runny nose, difficulty in smelling, headache, snoring, sleep apnea, … Continue reading What are Nasal Polyps?