Patients cough up blood in the morning for the following reasons: a. Respiratory system diseases: the most common have respiratory system diseases, for example, the most common cause is violent coughing destroys capillaries, resulting in the symptoms of coughing up blood in the morning. Bronchial dilatation, usually accompanied by coughing, coughing yellow pus sputum or white mucous sputum, patients with bronchial dilatation can appear haemoptysis, so it is important to seek medical attention in a timely manner. Second, pulmonary diseases: Patients with tuberculosis can also be seen coughing up blood in the morning, accompanied by symptoms such as wasting, low fever in the afternoon, night sweats and so on. Coughing and bleeding in the morning can be seen in patients with lung cancer. In addition to coughing and hemoptysis, such patients can also see symptoms such as lethargy, low fever in the afternoon and loss of appetite. Lung cancer is commonly seen in patients over 40 years old who have been smoking for a long time or have been exposed to second-hand smoke for a long time and have a family history of malignant tumors in their family. If this occurs, it is important to seek timely medical consultation for early and clear diagnosis. In addition, it can be seen in patients with pulmonary embolism, which will be accompanied by shortness of breath, difficulty in breathing, chest pain and other symptoms. Third, local bleeding: coughing up bleeding in the morning can also be seen in local bleeding in the mouth, such as gingivitis, which will show symptoms of coughing up bleeding in the morning, but will be accompanied by swelling and pain in the gums, etc. There will also be bleeding in the nasal cavity or local bleeding in the throat, which will appear with blood in the coughing sputum when coughed up by coughing. Fourth, cardiovascular system diseases: morning coughing and coughing up blood can be seen in patients with heart failure, and patients with heart failure can also have coughing and coughing up pink foam-like sputum, which is the most common disease of the cardiovascular system that can be seen in coughing and coughing up blood.