Itchy nostril lining may be due to chronic nasal vestibulitis, allergic rhinitis, nasal vestibular eczema and other reasons. 1. Chronic Nasal Vestibule Inflammation: Nasal vestibule inflammation is caused by harmful dust stimulation, nose picking, etc., which results in itching, tenderness, redness and swelling at the nasal vestibule. The posterior border of the nasal vestibule is located in the inner nostril, so the itching of the inner wall of the nostril may be caused by chronic nasal vestibulitis. 2. Allergic rhinitis: when stimulated by allergens such as pollen, dust, fungi, mites, animal dander, etc., itchy nose is easily produced. 3. Nasal vestibular eczema: there will be obvious itchiness occurring in the affected area, accompanied by rough and scaly skin. If in the acute stage, there is usually ooze in the local appearance, if it is chronic nasal vestibular eczema, there may also be roughness or thickening of the nasal vestibular skin phenomenon. The presence of itchy inner walls of the nostrils requires active medical attention and appropriate treatment as prescribed by the doctor.