Newborns crying their hearts out can be caused by physiological factors, intussusception, intestinal obstruction and other reasons. 1. Physiological factors: Since newborns can’t speak, they can only express themselves by crying. For example, babies will cry when they are hungry and will be relieved when their mothers have finished breastfeeding. The baby’s diaper is wet and uncomfortable, will also be a heartbreaking cry to express, timely change of diapers can be relieved. 2. Intussusception: It is caused by a section of intestinal tube being trapped in the connected intestinal lumen, making the passage of intestinal contents obstructed. Its common manifestations include severe abdominal pain, vomiting, blood in the stool, etc., so it will make newborns cry their heart out. It is recommended to carry out air enema reset, surgery and other ways of treatment in time. 3. Intestinal obstruction: It is one of the main causes of neonatal acute abdomen. It will cause the newborn to have a bout of abdominal cramps, anal stop defecation and exhaustion, abdominal distension and other manifestations, so it will lead to the newborn’s heart-breaking cry. As you can see, if it is a pathological factor that causes a newborn to cry his heart out, it is recommended to seek medical treatment as soon as possible and timely treatment.