The symptoms of tightness and soreness in the left back must be alert to gastritis, gastric ulcer, pleurisy or malignant tumor. If the symptoms cannot be relieved within a short period of time, you must not blindly treat them, but first go to the hospital for relevant examinations to clarify the cause and the severity of the disease. For some mild inflammatory lesions causing symptoms, they can be treated by using antibiotics or drugs that activate blood circulation and remove blood stasis. If it is caused by malignant tumors, further treatment may be needed. The symptom of tightness and soreness in the left back is most often due to overwork, the body produces a large amount of lactic acid and not fully metabolized, in this case, take physical therapy methods, such as massage, hot compresses are conducive to symptomatic relief, and eat more fresh vegetables and fruits, don’t eat oily food, which is conducive to the body’s recovery.