The baby cries every time he wakes up from sleep, which may be caused by physiological factors or indigestion and vitamin D deficiency. 1. Physiological factors: the baby cries every time he wakes up from sleep may be caused by physiological factors such as hunger or defecation, due to the baby’s age will not use language to inform the parents, can only be expressed in the form of crying, if there are no other symptoms, generally do not need to be treated. 2. indigestion: due to the baby’s digestive system is not well developed, gastrointestinal function is poor, if the one-time eating too much will cause indigestion, abdominal distension, abdominal pain and other symptoms, which is manifested in every time you wake up crying. 3. Lack of vitamin D: If the baby lacks vitamin D, it will lead to decreased sleep quality, so that the baby woke up crying symptoms, accompanied by occipital baldness, excessive sweating, irritability and other manifestations. The baby cries every time he wakes up from sleep, there may be other reasons, it is recommended that parents take the baby to the hospital, by the doctor according to the clinical symptoms, to clarify the cause of the disease and then treatment.