Itchy nose sneezing and runny nose may be caused by upper respiratory tract infection, allergic rhinitis, chronic rhinitis and other diseases. 1. Upper respiratory tract infection: upper respiratory tract infection is a general term for acute inflammation of the nasal cavity, pharynx or larynx, which is mostly caused by viral, bacterial and other pathogens, and may be triggered by factors such as rain, cold and anemia. Patients will cough, runny nose, sneezing, nasal congestion, itching and other symptoms. 2. Allergic rhinitis: Allergic rhinitis is a kind of allergic disease of nasal mucosa, the cause of which is mostly related to genetic, environmental and other factors, and the patient will have symptoms such as nasal itching, paroxysmal sneezing and watery nasal discharge, nasal congestion and so on. 3. Chronic rhinitis: chronic rhinitis is a chronic inflammatory disease of the mucosa of the nasal cavity and its lower layers, the cause of which may be endocrine, infections, and diseases of neighboring organs and other factors, patients often appear nasal congestion, runny nose, headache, etc., and some patients will have an itchy nose, sneezing and runny nose. The cause of itchy nose sneezing and runny nose is not the same, it is recommended that patients seek medical examination to clarify the cause of the disease and standardize the treatment.