If a newborn baby always cries at night while sleeping, it is mainly due to the following conditions. First, it is caused by the symptoms of calcium deficiency in newborns. If a newborn grows particularly fast and the parents of the newborn do not give the newborn vitamin D supplements in time, the newborn will often have symptoms of vitamin D deficiency in the body, which will lead to a decrease in the ability to absorb calcium. This can cause calcium deficiency secondary to the symptoms. After the calcium deficiency, the newborn will appear to always cry in bed at night. Secondly, it is caused by nocturnal cries in newborns. If the newborn has heat in the heart meridian or has cold in the spleen. In this case, it will cause the newborn to have nocturnal crying. For this situation, parents can give the newborn baby to use the method of massage to improve. For example, parents should focus on the heart meridian as well as the liver meridian of the newborn’s fingers, and they can rub the small heavenly heart.