Rickets, called nutritional vitamin D deficiency rickets, is a chronic systemic nutritional disease characterized by bone lesions, caused by a lack of vitamin D in children's bodies leading to disturbed calcium and phosphorus metabolism. Its typical manifestations are inadequate mineralization of the growing long bone shafts and bone tissue. In early-stage rickets, there are no obvious skeletal changes, primarily characterized by low levels of vitamin D and abnormal calcium and phosphorus metabolism, in which case consultation with a pediatric endocrinologist is advised. If evident skeletal deformities like pigeon chest, X-shaped legs, or O-shaped legs have already developed, corrective treatment is necessary, and an orthopedic consultation is required.