Newborns cry out old grunting, may be a normal physiological phenomenon, may also be due to indigestion, cold and flu and other reasons. 1. Normal physiological phenomenon: usually associated with the newborn’s own personality characteristics, some of the newborn’s personality is more introverted, more quiet, do not like to cry, in the stomach hunger or urination, defecation, due to physical discomfort, it may show the old grunting, crying phenomenon. 2. Indigestion: Because the gastrointestinal tract of newborns is not yet well developed, the digestive ability of the gastrointestinal tract is relatively weak, due to improper feeding, it is likely to lead to indigestion, resulting in gastrointestinal dysfunction, causing abdominal distension, abdominal pain and other discomforts, and some of the newborns, because they don’t like to cry, may appear to be always grunting phenomenon. 3. Cold and flu: If parents do not pay attention to keep the newborn warm, resulting in the newborn cold and flu, causing nasal congestion, runny nose, or fever and other symptoms, resulting in discomfort, there may be always humming, but due to their own do not like to cry, and thus show the phenomenon of not crying out. Newborns cry out old grunting, may also be caused by other reasons, parents should promptly find the cause, if necessary, need to take the child as soon as possible to see a doctor, diagnose the cause, give targeted treatment.