There are many reasons for the patient to have pain under the left side of the ribs: 1, because the patient has long-term chronic strain, strain or acute trauma to the left side of the ribs, resulting in damage to the ribs and intercostal muscles on the left side, resulting in lactic acid accumulation in the muscles and inflammatory factors in the muscles, which can produce pain; 2, if the patient’s left side of the ribs gets cold for a long time, there will also be local muscle If the patient’s left side of the rib cage is cold for a long period of time, localized muscle stagnation and blood stasis can also occur. After the patient has developed this condition, first of all, the patient should be instructed to reduce standing weight-bearing activities, and also pay attention to the warmth of the left side of the ribs, can be applied externally to activate blood stasis, swelling and pain relief ointment, can also carry out local herbal fumigation, can reduce the phenomenon of pain.