Patients with symptoms of nasal congestion, mainly on one side of the nasal cavity with symptoms of nasal congestion, mainly caused by obvious inflammation, swelling, postural changes, nasal septum deviation, hyperplasia, as follows: 1. The patient may show symptoms of nasal congestion on one fixed side, or alternating nasal congestion. 3. caused by deviated nasal septum: Some patients may have a deviated nasal septum to one side, resulting in the nasal cavity on this side becoming narrower and causing obvious nasal congestion. 4. caused by hyperplasia. When there are polyps, papillomas and other proliferations in the nasal cavity, it will also cause the occurrence of nasal congestion symptoms on one side.