Rickets in children will have different manifestations in different periods, typical manifestations include irritability, not easy to sleep at night, chicken chest and so on. 1. Early stage of the disease: common in six-month-old children, this period due to vitamin D deficiency, there will be a decrease in blood calcium concentration, the child can be manifested as increased neural excitability, easy to sweat, irritable, not easy to sleep at night, easy to cry, etc., if not corrected during this period, it will often enter the active period. 2. Active period: At this time, the child may have softening of the skull, ping-pong feeling of the skull, square cranial deformity after six months, and chicken chest, funnel chest, and corresponding thoracic anomalies at about one year old. If the corresponding treatment is carried out during the active period, the recovery period will often be entered. 3. Recovery period: After vitamin D supplementation, laboratory indicators can gradually become normal during the recovery period, such as alkaline phosphatase, blood calcium concentration, blood phosphorus concentration gradually return to normal. Children may also have other manifestations of rickets, it is recommended to go to the hospital in a timely manner, complete the examination to determine the cause of the disease, and then give targeted treatment or therapy.