Newborns lack of calcium can choose to sunbathe, supplement enough milk, eat vitamin D, as follows: 1, sunbathing: in the wind and sunshine, you can take newborns more sun, usually about 1-2 hours a day. Through the ultraviolet rays of the sun, promote skin synthesis of vitamin D; 2, supplement enough milk: milk is the best source of calcium, within one year of age of the child about 500ml of milk supplementation per day, can fully meet the need for calcium; 3, eat vitamin D: if the newborn blood levels of vitamin D and calcium decreased, need to be supplemented with vitamin D one to two per day, adhere to the supplementation of two months, and then recheck! Relevant laboratory indicators, so as to decide the next diagnosis and treatment program.