Chest pain at night in the elderly may be due to reflux esophagitis, coronary heart disease, and lung infection. 1. Reflux esophagitis: The ability of the esophagus to defend itself decreases gradually with age, which may cause reflux esophagitis in the elderly. It can lead to acid reflux, heartburn and other symptoms, and can cause chest pain when stomach acid refluxes upward. 2. Coronary heart disease: Coronary heart disease usually causes pain in the anterior heart area, and this pain is usually paroxysmal. This disease is usually due to coronary atherosclerosis, often occurring in patients with high blood lipids, high blood pressure, high blood sugar and other underlying diseases. 3. Lung infection: Lung infection can lead to fever, cough, sputum, dyspnea and other symptoms, due to the stimulation of inflammation will lead to chest pain symptoms, eating or coughing at night will stimulate the patient resulting in chest pain aggravation. Chest pain at night in the elderly may also be caused by lung tumors, patients should go to the hospital in time.