Infant calcium in the normal range of low value whether need to supplement calcium should be combined with the relevant examination comprehensive judgment, generally do not need special calcium supplement. The normal range of infant blood calcium is 2.25~2.75mmol/L, blood calcium value in the normal range of infants generally do not need special calcium supplements, can pay attention to care, reasonable diet, adhere to the sun often (avoid direct sun exposure) in order to prevent the blood calcium is too low. The baby’s blood calcium long time in the normal low value and accompanied by growing pains or affect the development of bones, manifested in the softening of the skull, such as using a finger to press the center of the occiput, parietal bone, there is a sense of elasticity, chicken chest, O-shaped legs, scoliosis and so on. At this time, vitamin D as well as calcium supplements should be taken as prescribed by the doctor. Therefore, infants should consult a medical professional for advice on the need for calcium supplements.