Cold and cough with blood may be due to violent coughing, which breaks the mucous membrane and leads to capillary rupture and bleeding, and may also be accompanied by hemoptysis caused by bronchial dilatation, pulmonary tuberculosis and so on. Colds are usually viral infections that generally cause edema, burning, and itching in the throat, which may lead to a violent cough. The mucous membrane of the throat is easily broken under the stimulation of coughing and blood is coughed up. When a cold patient is accompanied by bronchial dilatation, the structure of the bronchial wall is twisted and destroyed, and the blood vessels may be destroyed and bleed under repeated infections and constant coughing and coughing up pus and sputum. Coughing as well as blood in sputum is one of the common symptoms of tuberculosis, and there are usually systemic symptoms such as low fever in the afternoon and night sweats, and there may be inflammatory exudation, hyperplasia, and caseous necrosis of the lung tissues. Cold patients who themselves suffer from tuberculosis may also cough up blood. It is recommended to go to the hospital and take medication under the guidance of the doctor.