Left back pain can be registered orthopedics and cardiology, the details are as follows: First, orthopedic diseases, usually left back trauma, muscle strain, cervical spondylosis and other reasons, can lead to left back pain symptoms, pain symptoms are obvious when pressing, after local physiotherapy, massage, hot compresses, symptoms will gradually improve. Secondly, cardiology diseases, such as angina pectoris, can lead to left back involvement pain symptoms, which can also cause local muscle tension, with no obvious pain symptoms during compression, and the scapula and shoulder joint activities will not be affected. Therefore, if a patient presents with clinical symptoms of left back pain, he or she should determine whether to register with orthopedics or cardiology based on whether he or she has a history of heart disease and exertional disease.