Nasal vestibule refers to the structural area covering the skin on the inside of the nostrils in the front part of the nasal cavity. The causes of nasal vestibular itch include nasal vestibulitis, eczema and allergic rhinitis. 1. Nasal vestibulitis: Repeated nose picking, nose blowing and other bad behaviors can make the mucous membrane of the nasal vestibule erosion, or rhinitis, sinusitis and other nasal inflammation spread can lead to nasal vestibulitis, nasal vestibule itchy, accompanied by nasal vestibule fever, dryness, and tenderness and other symptoms. 2. Eczema: often associated with allergies, overwork and depression, endocrine dysfunction and other factors, including nasal vestibule itching and other clinical symptoms. 3. Allergic rhinitis: when allergic rhinitis occurs, the mucous membrane of the nasal cavity comes into contact with allergens, and an allergic reaction occurs, resulting in the symptoms of nasal vestibule itching, accompanied by runny nose, sneezing, nasal congestion and other symptoms. Nasal vestibule itching, should promptly consult the doctor, improve the relevant examination, clarify the cause of the disease, standardized treatment under the guidance of the doctor, so as to avoid delaying the condition.