When a patient has symptoms of bleeding when blowing the nose, it may be due to excessive force when blowing the nose, which may cause the local nasal submucosa blood vessels to break, thus triggering the bleeding condition. Some patients may have a dry nasal mucosa or have a certain degree of inflammatory and infectious diseases of the nasal cavity and sinuses as well as allergic diseases, which can easily lead to nose bleeding due to the action of blowing the nose. In addition, some patients may also have a significant deviation of the nasal septum, or bleeding-prone growths such as bloody polyps and hemangiomas in the nasal tract, which can easily cause bleeding symptoms when blowing the nose. If such bleeding symptoms occur repeatedly, a careful and comprehensive examination of the entire nose is required.