Pediatric rickets, also called vitamin D deficiency rickets, is a chronic nutritional deficiency disease characterized by vitamin D deficiency, resulting in disorders of calcium and phosphorus metabolism and clinical disorders of calcification of bones. The onset is slow, affecting growth and development, mostly occurring in children from three months to two or four years old. First, in the early stage, most of the onset of the disease from about three months, this period of psychoneurological symptoms, the child has sleep disturbance, crying, easy to sweat and other phenomena. Itchy scalp after sweating, while shaking the head on the pillow friction, occipital baldness, hair loss. Second, the radical stage, in addition to the initial symptoms, the child with skeletal changes and motor function development delay. The closure of fontanel is delayed, and the junction of ribs and costal cartilages on both sides is enlarged like beads, which is called rib beading. The middle of the sternum protrudes forward, resembling a “chicken breast” or sinking into a “funnel chest”. Children who can stand and walk, the two legs will form inward or outward bending deformity, that is, O-shaped or X-shaped legs. Third, the recovery period, after a certain treatment, all kinds of clinical manifestations are disappeared, the muscle tone is restored, the blood biochemical changes and X-ray manifestations also return to normal. Fourth, sequelae period, mostly seen in children after three years old, after treatment or natural recovery, clinical symptoms disappear, only severe rickets will leave different parts of different degrees of skeletal deformities.