Hidden pain in the middle of the chest may be related to coronary heart disease, gastrointestinal diseases, costochondritis, trauma and so on. 1. Coronary heart disease: When coronary heart disease strikes, it will lead to untimely supply of blood and oxygen, thus causing myocardial ischemia, and the typical symptom is vague pain in the middle of the chest. 2. Digestive diseases: common digestive diseases such as gastric ulcer, gastritis, gastroesophageal reflux disease (GERD), etc., because of Helicobacter pylori infection, excessive secretion of gastric acid, reflux stimulation of the esophagus, resulting in damage to the gastric mucosa and esophageal submucosal tissues, which often leads to vague pain in the middle of the chest. 3. Costochondritis: mostly caused by non-infectious factors, chest pain and pressure pain, caused by infectious factors can also appear local skin redness, swelling, heat and pain. The pain may radiate to the back of shoulder, armpit, cervical and thoracic region, and may be aggravated by deep breathing, activity or exertion. 4. Trauma: due to the chest suffered a violent blow, resulting in sternal rib bone damage and soft tissue damage, can appear in the middle of the chest hidden pain. It is recommended to go to the hospital in time for examination to find out the cause of vague pain in the middle of the chest and then treat it under the guidance of doctors.