Itchy nose, that is, nasal itch, may be related to external stimulation, acute rhinitis or chronic rhinitis and other causes. 1. External stimulation: when the nasal mucosa is stimulated by mechanical or physical factors such as pollen, irritating dust or chemical gases, it can lead to the release of local chemicals such as bradykinin, histamine, etc., which stimulate the superficial sensory nerve endings in the nasal mucosa, thus triggering itchy sensation. 2. Acute rhinitis: acute inflammation of the nasal mucosa caused by viral infection, can be inhaled from the respiratory tract virus, when the body’s resistance is reduced, the nasal mucosa is violated, at first it can cause nasal dryness, burning sensation, nasal itching, sneezing and other manifestations. 3. Allergic rhinitis: chronic inflammation of the nasal mucosa caused by allergens, etc. Due to individual exposure to allergens, the nasal mucosa appears obvious tissue reaction, which can be manifested as nasal itching, sneezing, snot, nasal congestion and other manifestations. If the nose is frequently itchy or accompanied by other uncomfortable symptoms, it is recommended to consult a doctor in time and follow the doctor’s instructions for treatment.