Nasal congestion may be caused by acute and chronic rhinitis, foreign bodies in the nose, deviated septum, nasal swelling, etc. It requires the use of drugs, surgical treatment, or radiotherapy. 1. Acute and chronic rhinitis: acute and chronic inflammation of the nasal mucosa. Acute rhinitis is usually treated early with antiviral drugs such as ribavirin. Acute and chronic rhinitis can be applied nasal decongestant, such as furosemide nasal drops, etc., to reduce nasal congestion, the treatment does not exceed 7 days; glucocorticoid nasal spray, such as budesonide nasal spray, etc., to reduce the swelling of the nasal mucosa. 2. Intranasal foreign body: Intranasal foreign body leads to nasal congestion, removing the foreign body can improve the symptoms. 3. Deviated nasal septum: generally due to congenital developmental abnormality or external impact, which leads to deviated nasal septum, causing one side of the nasal cavity obstruction, with the development of the disease, the opposite side of the inferior turbinate can be compensatory hypertrophy; or “S” type deviation, which can lead to bilateral nasal congestion, and surgical treatment can be taken, such as endoscopic deviated nasal septum correction surgery. 4. Nasal mass: Nasal polyps, intranasal papilloma, nasal malignant tumors can also cause dyspnea and nasal congestion, which need to be examined by rhinoscopy, CT or MRI, and generally need to be treated by surgical resection, such as malignant masses, and assisted by radiotherapy and chemotherapy if necessary. If the symptoms of persistent nasal congestion occur, it is recommended to consult a hospital and follow the doctor’s instructions for medication and treatment after the diagnosis is clear.