The common causes of dry and itchy nose are environmental factors, allergic rhinitis, vasomotor rhinitis and other causes. 1. Environmental factors: If the air in the environment is dry and the temperature is high, it can cause dehydration and dryness of the mucous membrane of the nasal cavity, which can lead to dry and itchy nose, sneezing and other symptoms. 2. Allergic rhinitis: when suffering from allergic rhinitis, dry and itchy nose, runny nose, sneezing and other symptoms can occur if you are exposed to pollen, dust, microorganisms or other allergic substances. 3. Vasomotor rhinitis: this disease may be caused by autonomic dysfunction, usually can be manifested as dry nasal mucosa, in the stimulation of physical and chemical factors or mental tension will appear nasal itching, sneezing and other discomforts. The symptoms of dry and itchy nose need to go to the hospital in time to check the specific cause and treatment, so as not to delay the condition.