Cold and sputum with blood may be caused by respiratory mucosal congestion and edema, capillary rupture, or may be a combination of other diseases, such as bronchial dilatation, etc., need to analyze the specific problems. After some people catch a cold, pathogens invade the respiratory tract, showing congestion and edema of the respiratory mucosa. When the body coughs, the violent impact of the airflow may cause rupture of the mucous membrane, capillaries, etc., which in turn manifests itself as sputum with blood. Some people have poor physical quality, cold at the same time suffering from a variety of diseases, for example, at the same time suffering from colds and bronchial dilatation, etc., at this time because of bronchial dilatation of hemorrhage, manifested as sputum with blood. There may be other reasons for coughing up sputum with blood, so it is recommended to go to a regular medical institution in time. After clarifying the cause, we should actively accept the treatment to avoid delaying the condition.