Common causes of rhinitis with clear nasal discharge are allergic rhinitis or acute rhinitis, and rare cases need to be ruled out with or without cerebrospinal fluid leakage. The causes of the disease are different, and the treatment methods are also different. 1. Allergic rhinitis: allergens stimulate the nasal mucosa after the allergic reaction, gland secretion, the symptoms of running nose, accompanied by nasal itching, sneezing, etc. It is recommended that patients stay away from allergens, use nasal sprays such as mometasone furoate, take antihistamines such as chlortetracycline, etc., and use saline to rinse the nasal cavity if conditions permit. 2. Acute rhinitis: Acute rhinitis is mostly related to viral infection, which is a self-limiting disease. It is recommended to take Lianhua Qingdian capsule and use ephedrine nasal drops to improve the symptoms. 3. Cerebrospinal fluid leakage: Cerebrospinal fluid leakage may be mistaken for rhinitis and repeated treatment is ineffective. It is necessary to combine the history of trauma, nasal surgery history to comprehensive analysis, improve nasal endoscopy, sinus CT, nasal secretion biochemical test, clear diagnosis, according to the situation of comprehensive treatment. It is recommended that patients go to the hospital for a detailed examination to identify the cause of the disease and rational treatment.