Spitting up blood in a patient with a cold is usually an abnormal condition. Because the clinical symptoms of colds are mainly fever, nasal congestion, runny nose, sore throat, and cough, spitting up blood is rarely seen. In case of spitting up blood, it is usually considered that the cough is more violent and causes the mucous membrane in the throat to rupture, thus causing spitting up blood, but the amount of blood is usually small and most of it can stop by itself. Consider the possibility of bronchitis, as bronchitis can also cause the mucous membrane of the bronchi to rupture and mix with the sputum, resulting in spitting up blood. When a patient with cold spits blood, it is also necessary to consider the possibility of complications of bronchiectasis or the development of tuberculosis. Therefore, if a patient with cold spits blood, it is necessary to improve the CT examination of the lung in time for clarification.