Atrophic rhinitis is divided into two categories: primary atrophic rhinitis and secondary atrophic rhinitis: 1. Primary atrophic rhinitis can occur in early childhood. Mostly due to systemic factors such as malnutrition, vitamin deficiency, endocrine dysfunction, genetic factors, immune dysfunction, bacterial infection, neurological dysfunction, and other factors. 2, secondary atrophic rhinitis more due to the long-term stimulation of external high concentration of industrial dust, food harmful gases. The stimulation of chronic pus blowing secretions from the nasal cavity and sinuses. Or chronic hyperplastic inflammation of the secondary lesions, nasal specific infection. Excessive deviation of the nasal septum, excessive damage to nasal tissue during nasal surgery, etc.