Saline nasal wash may be effective for Eustachian tube effusion caused by rhinitis, but it is less effective if it is caused by tumors, nasal septum, etc. Washing the nose with saline removes excessive nasal secretions and can keep the nasal cavity clean. Allergic rhinitis, chronic rhinitis and other diseases, due to a significant increase in nasal secretions, can appear nasal congestion and other symptoms, if the nasal mucosa hypertrophy blocked the pharyngeal opening of the Eustachian tube, there will be a dysfunction of the Eustachian tube, causing Eustachian tube effusion. The use of saline nasal wash can promote the patency in the nasal passage for a short period of time, which can help the treatment of Eustachian tube effusion. Diseases such as nasal tumors and deviated septum can also block the opening of the Eustachian tube. Saline nasal wash alone is not effective, and should seek medical treatment for tumor resection or nasal septum correction surgery. It is recommended that patients seek timely medical examination of the cause of Eustachian tube effusion, and use saline nasal wash reasonably under the guidance of the doctor.