When the nasal vestibule is irritated by secretion from the nasal cavity or harmful dust, or when skin injury is caused as the patient picks his nose, these will result in bacterial infection, giving rise to the disease. This is the cause of the illness. The disease pertains to the category of "Bichuang" (nasal sore) in TCM according to its clinical manifestations. When pathogenic wind and heat invade the exterior, the staghated heat of the lung meridian will go up. As the rising heat steams the inner nose, skin injury will occur, causing swelling and sore. This is the pathogenesis of the disease.According to the theory of traditional Chinese medicine, there are some patterns of syndrome that lead to nasal vestibulitis.1. Syndrome of stagnated heat of lung meridian2. Syndrome of dampness and heat of the spleen and stomach3. Syndrome of blood deficiency transforming into dryness