Newborns sleep hard to hold the red face can be seen in physiological phenomena, pathological conditions (such as gastrointestinal dysfunction, etc.), need to be analyzed on a case-by-case basis. 1. Physiological phenomenon: for the age of the baby, in the process of growth and development can appear in the “sleep hard to hold the face red” phenomenon, usually the spirit, reaction, breastfeeding are normal, no abnormal discomfort, is a normal physiological phenomenon. Or at night, the baby sleeps in a higher temperature environment, wearing clothes or thick blankets, causing discomfort, may also appear in the above situation, discretionary adjustment of the above phenomenon can be relieved. 2. Pathological conditions (1) Gastrointestinal dysfunction: If the newborn is not fed properly, causing gastrointestinal dysfunction, abdominal distension and other abdominal discomforts, the baby may experience the above phenomenon, or the baby has dry stools, defecation is more difficult, and functional constipation exists, and the situation of “sleeping hard and holding in a red face” may also occur. (2) Congenital megacolon: Most of these newborns have a history of delayed evacuation of fetal stools, and after birth, they may have difficulty in defecation and persistent constipation, which may be manifested in the above phenomena, and some of them may have serious complications such as intestinal obstruction, which require active consultation. It is recommended to consult a specialist to determine the cause if necessary.