Nasal mucosal erosion is the necrosis of mucosal epithelial cells on the surface of the nasal cavity or the widening of the gap between the cells, resulting in tissue fluid exudation, cell necrosis and vascular bleeding. In most cases, nasal mucosal erosion is a pathological condition due to dry air or inflammation of the nasal mucosa, such as various chronic rhinitis and allergic rhinitis, and due to disorders in the metabolic state of the body, such as eating foods on fire and poor intestinal function. Nasal mucous membrane erosion can cause nasal bleeding because the mucous membrane of the nose is a very rich vascular tissue. If it causes nasal bleeding, you can plug your nostrils with cotton or paper towels or pinch them with your hands first, and then see a doctor and apply Vaseline ointment after the bleeding stops.