There are several reasons for coughing with blood in sputum after waking up in the morning: 1. Acute infectious diseases of the respiratory system: Generally speaking, the most common is acute infectious diseases of the respiratory system, which lead to capillary destruction due to violent coughing and the formation of symptoms of coughing with blood in sputum. 2. Bronchial dilatation: While coughing with blood in sputum after waking up in the morning can also be seen in patients with bronchial dilatation. The cough with blood in the sputum can also be seen in patients with bronchiectasis, who may also have hemoptysis, so if there is a history of bronchiectasis in the sputum, you should generally consult a doctor immediately. 3. pulmonary tuberculosis: cough with blood in the sputum can also be seen in patients with pulmonary tuberculosis, accompanied by symptoms such as wasting, weakness, and low fever in the afternoon. 4. malignant tumors: cough with blood in the sputum can also be seen in patients with malignant tumors of the lung. It can also be seen in patients with malignant tumors of the lung, accompanied by weight loss, weakness, and low fever in the afternoon, often in patients over 40 years of age who have been smoking for a long time or have been in the environment of secondhand smoke for a long time, or who have a family history of malignant tumors in their family. 5. Oral bleeding: blood in coughing sputum can also be seen in local oral bleeding such as gingivitis, and nasal bleeding such as sinusitis, where nasal bleeding flows back into the pharynx and is coughed out by coughing. 6. Throat bleeding: Of course, it can also be seen in localized throat bleeding, which can also be seen in coughing up blood in sputum after waking up in the morning. Therefore, what happened to blood in the cough after waking up in the morning cannot be generalized, but may be seen in acute infectious diseases of the respiratory system or tuberculosis or malignant tumors of the lungs, or local bleeding in the mouth, or nasal cavity, as well as the pharynx, and some of these symptoms can be seen.