Chest pain all the time may be caused by chest wall diseases, cardiovascular diseases, respiratory diseases and so on. 1. Chest wall diseases: acute dermatitis, subcutaneous cellulitis, herpes zoster, intercostal neuritis, costochondritis, rib fracture and so on are common, which can cause chest pain. 2. Cardiovascular diseases: common are coronary atherosclerotic heart disease, hypertrophic cardiomyopathy, acute pericarditis, pulmonary embolism, etc., which can present the symptom of chest pain all the time. 3. Respiratory diseases: common are lobar pneumonia, bronchitis, bronchodilatation, lung abscess, lung cancer, etc., which can present symptoms of chest pain. 4. Others: such as mediastinal tumor, reflux esophagitis, hiatal hernia of the esophagus and so on, which can also present this symptom. There are many reasons that cause chest pain all the time, so it is recommended to go to the hospital in time for consultation and timely treatment.