Nose is always itchy may be environmental factors, allergic factors, infection factors. 1. Environmental factors: a long time in the high temperature environment, and the air is dry, less drinking water, resulting in dry nasal mucosa, will cause the nose often itchy, but no other clinical symptoms, eliminate the above triggers, can improve on their own. 2. Allergic factors: for example, allergic reactions to pollen, animal hair and other allergens cause allergic rhinitis, which can lead to frequent itching of the nose, which may also be accompanied by runny nose, sneezing, tearing and other symptoms. 3. Infectious factors: when there is a viral cold, it may lead to congestion and edema of the nasal mucosa, which may also cause itchy nose, accompanied by fever, fatigue, sneezing, coughing and other symptoms. In addition to the above triggers, the nose often itchy may also be associated with nasal vestibulitis, nasal eczema, nasal tuberculosis and other factors, so frequent symptoms of itchy nose, it is recommended to seek medical attention for the appropriate examination and treatment, to avoid delays in the condition.