Elderly people with pain on the left side of the heart most often consider myocardial ischemia, lung cancer, rib fracture, intercostal neuralgia, pleurisy and so on. 1. Myocardial ischemia: narrowing or occlusion of coronary artery lumen leads to myocardial ischemia, which is manifested as chest pain, chest tightness and tightness in chest, and it is mostly oppressive pain, which is easily triggered by emotional tension and exertion. 2. Lung cancer: the invasion or destruction of surrounding tissues caused by cancer, especially after involving the pleura, will also cause related symptoms. 3. Rib fracture: the old people have osteoporosis, which can easily cause fracture after compression or trauma, manifesting as chest pain, chest tightness, etc., and the pain will be aggravated when changing the position or taking a deep breath. 4. Intercostal neuralgia: mainly caused by neuropathy, after infection or local stimulation, it manifests as pain distributed along the intercostal nerves, and the pain will be aggravated when coughing or deep breathing. 5. Pleurisy: such as pneumonia, inflammation invades the pleura, manifested as chest pain, chest tightness, etc., the pain is mostly stabbing or pulling pain, and the pain can be aggravated when coughing. The pain on the left side of the old man’s heart may have other reasons, and it is recommended that the patient consult a doctor in time to avoid delaying the condition.