There are many reasons for rib collapse, such as calcium deficiency, rib fracture, rib tumor, etc. Conservative or surgical treatments are often taken according to the causes of rib collapse. 1. Calcium deficiency: If infants and young children are deficient in calcium, rickets can be caused in severe cases, resulting in the collapse of ribs, which needs to be relieved by supplementing calcium and vitamin D, etc. 2. Rib fracture: If the chest is hit by external force, resulting in a localized rib fracture or periosteal injury, the patient will also have symptoms of rib collapse. In this case, the patient should consult the doctor as soon as possible. After clear diagnosis, the patient can choose external fixation treatment or surgery. 3. Tumor of ribs: If some tumors of ribs lead to the destruction of rib bone, it will cause the change of rib structure and rib collapse. In this case, conservative or surgical treatment should be chosen according to the specific situation of the tumor. There may be other reasons for rib collapse, such as intercostal nerve injury, soft tissue injury in the chest and so on. It is recommended to go to the hospital in time for consultation and targeted treatment after clarifying the cause.