The main reasons for nose bleeding are: 1, due to dry hot weather so that the normal nasal mucosa moisture evaporation too fast, and nose bleeding, and, long-term eating dry, spicy, irritating food can also cause nose bleeding; 2, nose injury caused by bleeding, nose exposed, in the more violent trauma prone to bleeding. 3, nose picking caused by bleeding. Digging nose caused nose cell tissue injury resulting in bleeding. 4, nose inflammation caused by bleeding. Acute, chronic rhinitis and other inflammatory diseases will occur. 5, nose bleeding caused by other diseases, such as blood diseases.