Irregular pain in the anterior chest and back is pain that occurs when the nociceptive nerve endings in the anterior chest and back are stimulated by an irritant either simultaneously or intermittently. Irregular pain in the anterior chest and posterior back can be caused by one disease or two diseases. 1, a disease caused by irregular pain in the chest and back: ① cervical spondylosis, frozen shoulder and other diseases can cause irregular pain in the chest above the chest and back. ② angina pectoris and coronary heart disease and other ischemic heart disease can cause pain and discomfort in the precordial region, and can radiate to the back of the left shoulder. ③ Esophagitis can cause anterior subxiphoid pain and back pain. 2. Two diseases cause irregular pain in the anterior chest and back: one disease causes pain in the anterior chest, while another disease causes pain in the back. There are many other causes of irregular pain in the chest and back besides the above, and it is recommended to go to the hospital for diagnosis and treatment in time.