If there is pain under the ribs on the left side, we should first clarify whether there is a history of trauma, such as impact, fall, etc. If there is contusion or rib fracture in the soft tissues around the ribs in this area, there will be obvious pain at the injury site, especially when breathing, coughing or when turning the chest, this pain is similar to the pain of forked breath. If there is no history of trauma, it is possible that the pain under the left rib cage is caused by long-term poor sitting or sleeping posture, as well as prolonged head and waist down, which leads to local soft tissue compression, resulting in tissue hypoxia, congestion and edema, forming a sterile inflammation and requiring anti-inflammatory treatment for pain. In addition, local tumor occupancy can also lead to similar pain.