Convex ribs are mainly seen clinically in children with rickets, also known as vitamin D deficiency rickets, which leads to abnormal bone mineralization, bone softening, abnormal hyperplasia, and pathological changes in the sternal ribs, with the appearance of a chicken chest, a beaded chest, and bulging and outwardly turning ribs. The disease is mainly caused by vitamin D deficiency and calcium deficiency and is most common in children under three years of age. The lack of calcium and vitamin D in the patient’s diet leads to abnormal development of the thorax, resulting in a bulging rib cage. The bulge can be prominent on the right side, on the left side, or overall and below. Patients can choose to go to the hospital to check the trace elements, and if they lack calcium or vitamin D, they can choose to take oral calcium tablets and multivitamins to supplement, and children should get more sunlight. Vitamin D deficiency rickets through active treatment, all can achieve good results, will not leave a very obvious sequelae, must be actively treated.