The common reasons why newborns are sleepy and cry are hunger, environmental discomfort, illness and so on. 1. Hunger: because newborns can not speak, can only cry to express their needs. Newborns in the hungry state is easy to produce crying and sleep, while most babies will have sucking and other food foraging action, can be relieved by feeding the baby crying. 2. Environmental discomfort: If the baby’s sleeping environment is not quiet enough, or if the baby is underdressed or overdressed when sleeping, it will cause the baby’s sleep quality to be affected, and will make the baby feel uncomfortable. As a result, babies will not be able to sleep and express themselves by crying. 3. Diseases: For example, intestinal obstruction, intussusception and other diseases, when the disease attack, the baby will have severe abdominal pain, so it will lead to the baby’s difficult to cry and can not sleep. Usually the baby will cry heartbreakingly, and will be accompanied by abdominal distension, vomiting and other manifestations. There are many reasons why a newborn baby is sleepy and cries, and it is necessary to analyze the specific causes and make targeted treatment.