Nasal polyp symptoms are quite varied, and these mainly relate to the number of nasal polyps, the severity of the polyps, and the subjective feelings of the patient. If the nasal polyps are small, there may not be obvious clinical symptoms, and the patient might not feel any discomfort; these polyps might only be discovered during a physical examination. If there are more significant numbers of polyps, they can cause common clinical symptoms such as nasal congestion, runny nose, headache, dizziness, reduced sense of smell, and snoring during sleep. If the nasal polyps are severe, they might even lead to changes in the external shape of the nose, such as a saddle nose or a crooked nose, and in severe cases, they could induce comprehensive sinusitis.