Baby’s dream crying needs to be alerted to be caused by fright, vitamin D deficiency or calcium deficiency, as well as physical discomfort, environmental discomfort and so on. If necessary, medical treatment is needed. If a baby is frightened during the day, it is likely to manifest in dreams and cause crying. In addition, vitamin D and calcium deficiencies can also lead to increased excitability of the nervous system, which may also cause your baby to cry during sleep. If the baby’s gastrointestinal tract is uncomfortable, such as intestinal cramps and other conditions, due to stomach pain can also cause crying during sleep. Parents should be careful observation, timely detection of problems, so that the baby’s sleep environment more comfortable, adjust the appropriate temperature, but also can not be too much noise, if the baby crying symptoms continue to be unable to alleviate, the need to go to a formal medical institutions to find a doctor for consultation.