If a patient develops chest fever, there are usually several factors as follows: 1, cardiogenic diseases, such as coronary atherosclerotic heart disease, unstable angina, arrhythmia, myocarditis, pericarditis, infective endocarditis, etc., there will be symptoms and manifestations of chest fever when there is insufficient blood supply to the coronary arteries leading to ischemia and lack of oxygen. 2, respiratory system diseases, when there is a significant inflammatory response in the respiratory system. For example, when there is acute bronchitis, lung infection, pleurisy, pleural effusion, etc., there will also be chest fever and elevated body temperature. 3, digestive system diseases, if there is a series of diseases such as reflux esophagitis, gastroduodenal ulcer, etc., there will also be symptoms of heat in the chest due to acid reflux, heartburn and self-consciousness.