One and a half year old baby sleep difficulty this situation, first need to consider whether there is a lack of calcium, usually there is no supplemental vitamin D, if there is supplemental, it is recommended to add some calcium, if there is no supplemental, it is recommended to supplement the vitamin D and calcium, such as Icosin, pediatric Dicao granules. Usually pay attention to more sunshine, promote calcium absorption, eat more calcium-rich food, such as nuts or milk and so on. In addition, the mother’s diet should pay attention to eat more calcium-rich foods, and at the same time, pay attention to avoid getting cold, if the abdomen is cold, it may also lead to the child’s abdominal discomfort, resulting in difficulties in sleeping and other situations. In addition, you need to see if your baby is hungry, if he/she is not full and hungry, it may also lead to difficulty in falling asleep.