It is normal for patients with pulmonary tuberculosis to sometimes have blood in their nasal mucus. One of the most obvious clinical manifestations in patients with pulmonary tuberculosis is blood in sputum, which is mainly due to the necrosis of lung tissues and broken capillaries caused by tuberculosis-resistant bacilli. The necrotic material and blood in the capillaries enter into the secretion, which is discharged through the mouth or nasal cavity, and the situation of blood in the nasal mucus sometimes occurs. Tuberculosis patients with the disease will have symptoms of severe coughing, coughing tracheobronchial constriction, mucosal damage, can also lead to submucosal capillary rupture. The blood in the blood vessels enters the patient’s respiratory tract and is discharged with the secretions, which can be seen as blood when blown out of the nose. Therefore, in the process of treating tuberculosis, it is necessary to regularly review the examination and dynamically observe the development and changes of the disease. If abnormalities occur, consult the doctor in time to prevent the occurrence of adverse reactions.