A little vague pain in the chest suggests that the painful area may be traumatized, inflamed, infected, stretched, ischemic and hypoxic, and produces inflammatory mediators intermittent stimulation of nerve endings or other areas of involvement pain. It is common in chest wall diseases, heart diseases, lung diseases and digestive system diseases. 1. Chest wall diseases (1) Chest wall bone fracture and chest surgery incision healing, often feel a little hidden pain in the chest in cloudy weather and barometric pressure changes. (2) Costal chondritis: swelling and bulging of the costal cartilage, stimulating the pleura of the rib cage and causing vague pain in the chest. (3) Intercostal neuritis: Intercostal neuritis may cause vague pain in the chest innervated by the intercostal nerves. (4) Female breast disease: female breast fibroid hyperplasia, breast cysts, etc. can cause vague pain in the chest wall under the breast. (2) Heart disease: ischemic heart disease such as angina pectoris, coronary heart disease, etc. may cause vague pain in the chest precordial area due to myocardial ischemia. 3. Lung diseases: lung infection, lung cancer, pleurisy can stimulate the wall pleura and cause vague pain in the chest. 4. Digestive diseases: reflux esophagitis, hiatal hernia, gastritis, gastric ulcer, liver and gallbladder diseases may cause gastric reflux and detrusor pain, which may lead to vague pain in the chest under the posterior sternal eminence. The chest is a little hidden pain, it is recommended to go to the hospital as soon as possible for further diagnosis and treatment.