The pain in the left side of the ribs can be caused by several reasons: first, diseases of the ribs, when the ribs have bone tumors or metastases, or tumors caused by the hematological system, there can be pain in the ribs themselves, which should be diagnosed and treated by early examination of CT and ECT of the ribs; second, intercostal neuralgia, intercostal neuralgia can also have pain at the intercostal nerve at the rib cage, often hidden pain, stabbing pain or Third, herpes zoster, in the early stage of herpes zoster, there can be pain at the rib cage of one side of the chest, often hidden pain or stabbing pain, after 1-2 weeks of incubation period, there can be clusters of herpes, then we should go to the dermatology department for diagnosis and treatment.