Back pain at the left shoulder blade can be treated with rest, braking, medication and surgery if it is caused by trauma. If it is caused by fasciitis and muscle strain, it can be treated by physical therapy and medication. If the left shoulder blade back pain is caused by lung diseases such as lung abscess, lung cancer, etc., the primary disease needs to be treated. 1. Landing on the back of the left shoulder after trauma can cause swelling and pain in the tissues at the back of the left scapula, and in serious cases, it may cause scapula fracture. Need to pay attention to rest, left upper limb suspension braking, can promote injury recovery. (1) Drugs can be taken orally as anti-inflammatory and analgesic drugs, such as nimesulide, diclofenac sodium and so on. (2) If the injury is serious with scapular fracture, it can be treated with surgical incision and internal fixation. (2) If the pain is caused by aseptic inflammation caused by fasciitis and muscle strain on the back of the left shoulder, it can be treated by localized hot compresses, massage, baking, massage and other physiotherapy, and anti-inflammatory and analgesic drugs such as diclofenac sodium can also be taken orally. 3. If the pain in the back of left shoulder blade is caused by lung diseases, such as lung abscess, lung cancer, etc., it is necessary to treat the primary disease, such as lung abscess irrigation and drainage, lung cancer resection, etc. After controlling the primary disease, the pain in the back of left shoulder blade can be treated by local hot compress, massage, baking and massage, and physiotherapy. After the primary disease is controlled, the pain in the back of the left shoulder will be relieved naturally. If the symptoms of back pain at the left shoulder blade appear, it is recommended that the patient go to the hospital to clarify the cause of the disease and receive regular treatment.