Left side rib ectropion may be physiological, such as improper sleeping posture, but also may be caused by pathological reasons, such as rickets need to be targeted to take conservative treatment or surgical treatment to correct. Physiological left rib ectropion is often seen in children with long-term improper sleeping posture or children with calcium deficiency, if it is caused by improper sleeping posture, parents need to assist the child to carry out passive chest expansion exercise, which can help to improve the rib ectropion, and if it is caused by calcium deficiency, it is necessary to supplement calcium supplements in time and get more sunshine. For pathologic rib ectropion, most of them are caused by rickets, need to follow the doctor’s advice timely supplementation of calcium and vitamin D. Some children have passed the developmental period, conservative correction is often ineffective, and surgical correction can be taken. It is best to go to the hospital and have the doctor find out the cause of the rib ectropion and then take corrective measures.