Left shoulder blade pain may be associated with malignant tumors, but can not be considered as a sign of cancer, other diseases can also cause corresponding symptoms, mainly including soft tissue lesions, immune system disorders, and diseases of neighboring organs and so on. 1. Malignant tumors: malignant tumors occurring around the scapula involving the nerves, such as Ewing’s sarcoma, chondrosarcoma, etc., can indeed cause symptoms of peripheral pain. 2. Soft tissue lesions: the occurrence of muscle and fascia injury around the scapula causes aseptic inflammation around the scapula, and repeated stimulation will cause pain around the scapula. 3. Immune system diseases: mainly including rheumatism, rheumatoid arthritis, etc., involving the scapula and the surrounding soft tissues, which can also cause pain symptoms. 4. Diseases of neighboring organs: mainly including lung diseases involving the pleura, angina pectoris, myocardial infarction, etc., will cause pain and discomfort in the corresponding areas. In addition to disease, cold or overwork can also cause short-term pain in the surrounding discomfort, pain symptoms can not be relieved, you need to consult a doctor in a timely manner, to determine the specific conditions, under the guidance of the clinician standardized treatment.