Most babies cry at night, sleep restlessly and wake up easily due to calcium deficiency, because small babies grow faster and are very prone to calcium deficiency if they do not take calcium supplements in time. If the baby is deficient in calcium, he or she will also have more sweating, wake up easily, have pillow baldness at the back of the head, and even shake his or her head and shake his or her hands, so you can go to the hospital to have a test for trace elements and vitamin D. If the baby is deficient in calcium, he or she will get better after two weeks of treatment with vitamin AD and calcium carbonate granules. It can also be intestinal spasms, children will also appear night crying, usually also have irregular stools, some are constipation, a few days to solve the stool, some are thin stools, green color or vomiting, bloating, etc., treatment can eat probiotics to regulate the gastrointestinal function. If oral treatment does not work well for a week or so, if you are formula feeding, you need to see if there is a possible allergy to formula, you can change to deeply hydrolyzed formula or amino acid formula feeding. If you are adding complementary foods, try to avoid contact with allergy-prone foods. According to the current situation, you can give vitamin AD and calcium carbonate granules to supplement calcium and probiotics to regulate the gastrointestinal function.