The pain below the left shoulder and above the chest may have the following causes: first, intercostal neuralgia, when intercostal neuralgia, there can be pain in the intercostal nerve at the rib cage below the shoulder and above the chest, often as a hidden pain, stabbing pain or radiating pain, then early examination and examination, if necessary, early nerve nutrition and closed treatment; second, herpes zoster, in the early stage of herpes zoster, there can be pain below the shoulder, above the chest and back, then as a hidden pain or stabbing pain, after 1-2 weeks of incubation period, then to the dermatology department. In the early stage of herpes zoster, there can be pain under one shoulder, above the chest and back, which is vague or tingling, and after 1-2 weeks of incubation period, there can be clusters of herpes, which should be diagnosed and treated in the dermatology department at an early stage, ECT examination is needed for diagnosis and treatment.