Hello, is it consistent or paroxysmal? Is it related to physical exercise? Will deep breath worsen it? How old are you ? Have you ever been diagnosed with digestive ulcer?
A few life-threatening chest pain: ischemic heart disease, pulmonary embolism, pneumothorax，aortic dissection. other disease: pneumonia, Ribitis， shingles, Intercostal neuritis，pleurisy（TB ,maybe no fever）Esophagitis, hiatal hernia, esophageal cancer, lung cancer. There're many possible causes, you need to go to hospital, get tests so that doctors can know what it is.