The left side of the rib cage is more convex than the right side of the rib cage may be due to physiological reasons, rib fractures, scoliosis, thoracic organ diseases and other reasons, physiological reasons do not need special treatment, pathological causes of treatment, including drug treatment, surgical treatment, etc., the use of drugs should follow the doctor’s instructions. 1. Physiological reasons: normal body bilateral ribs are not completely symmetrical, there will be a side of the protruding performance, the left side compared to the right side of the protruding, there is no clinical manifestation, mostly belong to the normal physiological manifestations, this kind of situation does not require special treatment. 2. Rib fracture: For acute or old rib fracture, one side may be higher than the other after the broken ends are aligned, which can be clearly diagnosed by X-ray, and if the situation is serious after diagnosis, surgical intervention is needed. 3. Scoliosis: Scoliosis of different degrees due to poor sitting and standing postures can also lead to this condition. Mild scoliosis can be left untreated, while surgery can be chosen for serious cases. 4. Diseases of thoracic organs: such as tuberculous pleurisy on the left side, resulting in pleural effusion, pleural effusion will push up the left side of the ribcage as the left side of the ribcage protrudes, and anti-tuberculosis treatment is needed, such as the use of isoniazid, rifampicin, etc. If the amount of pleural effusion is large, it can be treated by surgery. If the amount of pleural effusion is large, treatment such as closed drainage of the chest cavity is feasible. The left side of the rib cage is more convex than the right side of the rib cage, there are other causes, it is recommended that the patient seek medical treatment in time, so as to avoid delaying the condition.