The common causes of left chest tugging pain are mainly the following: a. Elderly female patients can be due to malignant tumors of the left breast invading the chest wall and muscles, causing tugging pain in the left side of the chest. At this time, the patient can improve the breast ultrasound, magnetic resonance, molybdenum target and other examinations, to clarify the nature of the lesion, as soon as possible to carry out the excision of the malignant tumor of the breast. After surgery, combined with local radiotherapy, systemic chemotherapy, endocrine therapy and other comprehensive treatment, effectively reduce the left side of the chest pulling pain. Second, left rib fracture will cause intercostal nerve injury, accompanied by the left side of the chest pulling pain. At this time, patients can improve the CT or X-ray examination of ribs to clarify the severity of rib injury. As soon as possible to carry out internal fixation or external fixation of ribs, repair the rib fracture after the left side of the chest pulling pain can be gradually relieved.