Blood in the sputum in the morning may be related to oral diseases, respiratory diseases, cardiogenic diseases, and so on. 1. Oral diseases: If you suffer from oral ulcers, gingivitis, periodontal disease and other diseases, it will lead to bleeding of the oral mucosa, gums, etc., and the blood will be coughed out along with the sputum. 2. Respiratory diseases: including bronchitis, tuberculosis, lung infections, pleurisy and other diseases, these diseases are related to bacterial infections, the body is attacked by germs, the first damage to the respiratory tract and airways, will induce coughing and coughing up sputum, coughing process may lead to rupture of blood vessels of the airways, resulting in sputum with blood in the situation. 3. Cardiogenic diseases: patients with left heart insufficiency can easily cause pulmonary stasis, which can induce coughing and sputum with blood. For different causes, the specific treatment will be different, patients with the above symptoms need to go to the hospital for clarification.