Nasal mucosal erosion is mainly caused by bad habits, rhinitis, diabetes, environmental factors and other reasons. 1. Bad habits: If there are bad habits such as rubbing the nose and picking the nostrils in daily life, the repeated stimulation of the nasal mucosa can cause nasal mucosal erosion or bleeding. 2. Rhinitis: acute rhinitis, chronic rhinitis, allergic rhinitis, dry rhinitis and other diseases, due to the inflammation of the nasal mucosa stimulation, the nasal mucosa will appear congestion, edema, and in severe cases, can cause mucosal erosion symptoms. 3. Diabetes: diabetic patients due to insulin function abnormality, can cause nasal mucosa dry, nasal mucosa ulcers and other symptoms, and due to diabetes will affect the wound is not easy to heal, long time will form nasal mucosal erosion. 4. Environmental factors: if the long-term dry climate, high temperature, or the air contains more irritants, it is easy to cause nasal dryness, nasal mucosa thinning, and then cause nasal mucosal erosion. Nasal mucous membrane erosion, need to go to the hospital in time to identify the specific causes and treatment, so as not to delay the condition.