8-month-old baby crying at night sleep, need to find the cause of the baby crying in order to deal with it accordingly. First of all, cause the baby to cry, whether it is because the baby’s sleeping environment makes the baby uncomfortable, such as the softness and hardness of the bed is not suitable, the surrounding environment is noisy, the light is more intense, all of these can affect the baby’s sleep, the baby cries, the appropriate intervention can be dealt with. Another common reason for babies to cry in their sleep is that they are not feeling well, common intestinal cramps, intestinal flatulence, indigestion and so on. At this time you can give your baby a hot compress and clockwise massage of the lower abdomen to help your baby to promote intestinal peristalsis and relieve the discomfort of the stomach. At the same time, you can give your baby oral probiotics to regulate the micro-ecological environment of the intestinal tract and promote digestion. Baby sleep not solid, crying there is another reason is vitamin D deficiency, lack of vitamin D, the baby may appear to cry, easy to wake up, and even accompanied by occipital baldness, this situation needs to be given to the baby vitamin D supplementation for appropriate treatment.