Hidden pain in the chest may be caused by physiological factors, or by pathologic factors such as lung diseases such as pneumonia, pleurisy, or heart diseases such as coronary heart disease and viral myocarditis. 1. Physiological factors: strenuous exercise, wind, cold, etc. may lead to localized chest pain, which can usually be relieved after rest. 2. Chest diseases: such as pneumonia and pleurisy. (1) Pneumonia: Pneumonia refers to the inflammation of terminal airways, alveoli and tissues surrounding the bronchial walls, which can be caused by pathogenic microorganisms, physicochemical factors, immune injury, allergies and medications, and can cause symptoms of occult pain in the chest, accompanied by fever and cough. (2) pleurisy: mostly due to trauma, infection and other factors, inflammation stimulation of the pleura can cause hidden pain, pleurisy patients will also have chest tightness, dyspnea, and coughing and sputum and other manifestations, and severe cases may have respiratory distress. 3. Heart disease: such as coronary heart disease, viral myocarditis and so on. (1) Coronary heart disease: ischemia of the heart caused by narrowing or complete occlusion of the coronary arteries, which leads to hypoxia and necrosis of the heart muscle, resulting in symptoms such as chest tightness, vague or obvious pain in the chest, and dyspnea. (2) Viral myocarditis: it is an inflammatory disease of the myocardium caused by viral infection, which is often characterized by symptoms such as fatigue, panic, chest tenderness and discomfort, followed by obvious chest pain in the later stage, and in severe cases, it may lead to sudden death. If the symptom of chest pain persists, you can go to the hospital for relevant examinations to identify the cause of the disease and then treat the symptoms.