Calcium deficiency in babies is manifested in excessive sweating, occipital baldness, night terrors, etc. Parents need to go to the hospital for testing in a timely manner. If a baby is deficient in calcium, even in the winter when the weather is relatively cold, the baby will sweat more when sleeping, and will also be accompanied by night terrors, sleep is not stable, or sudden crying and other adverse reactions, and occipital baldness is also one of the manifestations of calcium deficiency. Calcium deficiency in babies may also have other aspects of the performance, such as frequent head shaking, chicken chest, etc., so if parents can not judge the case, it is recommended to take the baby to the hospital in time for trace element examination, to determine the lack of calcium is required under the guidance of the doctor for appropriate calcium supplementation.