Rickets, also known as Vitamin D-deficiency rickets, implies from its name that the cause of the disease is due to insufficient intake of Vitamin D in children, leading to disorders in calcium and phosphorus metabolism and resulting in nutritional disease with skeletal deformities. The incidence of the disease is higher in the north than in the south. Currently, the incidence of mild and moderate rickets is relatively high, while severe cases are less common because people are increasingly paying attention to the supplementation of Vitamin D for children. It is recommended that full-term infants start supplementing with 400 units of Vitamin D daily two weeks after birth, which is the physiological requirement. For premature infants, twins, and extremely low birth weight infants, the daily physiological requirement of supplementation is 800 units per day. After supplementing continuously for three months, it should be adjusted to 400 units per day as per the requirement for full-term infants. With such management, the child will not suffer from rickets. However, if there is no regular supplementation after birth, the lack of Vitamin D can lead to skeletal changes in the child, and once rickets is diagnosed, it requires high doses of supplementation.