Itchy nose sneezing is usually caused by allergic rhinitis, upper respiratory tract infection, physical and chemical stimulation. 1. Allergic rhinitis: due to contact with external allergens, such as pollen, dust mites, etc., stimulation of the nasal cavity caused by the occurrence of allergic rhinitis, which can be manifested as itchy nose, sneezing, runny nose and so on. 2. Upper respiratory tract infection: Due to the low immunity of the body, it leads to the invasion of virus or bacteria, which triggers upper respiratory tract infection. Therefore, patients have symptoms of itchy nose and sneezing, which may be accompanied by fever, headache and fatigue. 3. Physical and chemical stimulation: it may also be stimulated by particulate matter in the air of the external environment, such as perfume or irritating odor. It may stimulate the nasal mucosa, so the phenomenon of itchy nose and sneezing occurs, but only transient. If the itchy nose sneezing is not temporary, you should go to the hospital in time for examination and clear diagnosis, and follow the doctor’s instructions for treatment.