His mother thought the child was calcium deficient and blindly gave the child cod liver oil and calcium tablets, but they never worked. What is cerebral palsy? Cerebral palsy refers to “central movement disorders and postural abnormalities caused by non-progressive brain injury from before birth to one month after birth.” In other words, the main manifestation of cerebral palsy in children is motor impairment and postural abnormalities. The early manifestation of this motor impairment is delayed motor development, which is often referred to as “softness” by parents, such as delayed head lifting, rolling over, holding objects, sitting and standing. The most common postural abnormalities are head tilting back, eye strabismus, internal rotation of the upper limbs, hand back, and inward tiptoeing of the lower limbs. If we follow up the medical history, most of the children have mental retardation because the mothers have a history of difficult births, and the children have hypoxia and asphyxia before and after birth, and brain CT examinations also show abnormalities. Therefore, it is necessary to identify cerebral palsy and rickets at an early stage. Many parents believe that children with calcium deficiency are “soft”, so they blindly give calcium supplements to early cerebral palsy children and delay the treatment. In fact, calcium deficiency in children is a chronic nutritional disease caused by abnormal calcium and phosphorus metabolism due to vitamin D deficiency, which is fundamentally different from cerebral palsy. The main manifestations of rickets in infancy are crying, easy to be frightened, excessive sweating, etc. In heavy cases, there may be delayed movement development, but all other aspects are normal, and there is usually no abnormal posture or mental retardation, and the mother has no history of difficult delivery or cerebral hypoxia before or after the child’s birth.