Patients with blood in the sputum from the nose, usually also known as aspirated snot and blood, may have multiple causative factors, as follows: 1, nasal mucosa problems: most commonly, there is erosion and rupture of the nasal mucosa and a small amount of blood oozing, and bloody secretions may be able to be sucked back into the throat together, presenting the performance of blood in the sputum. 2, nasal cavity diseases: some patients may have nasal, Sinus inflammatory infectious or allergic diseases, may also have a significant deviation of the nasal septum, or the appearance of nasal hemangiomas, papillomas and other bleeding-prone growths, are likely to lead to similar symptoms. It is necessary to focus on the nasal cavity, sinuses and nasopharyngeal region for malignant lesions, and further nasal imaging is needed if necessary.