Infants two days without poop can be divided into physiological reasons and pathological reasons, physiological reasons for normal phenomena, pathological reasons need to consult a doctor in time, symptomatic treatment. Physiological reasons: due to the infant gastrointestinal function development is not perfect, defecation is not regular, easy to be affected by external factors, generally not more than three days are normal phenomenon. In addition to the lack of defecation, the baby’s mental state, diet, sleep and other general conditions are good. Pathological causes: babies two days without poop also need to exclude disease factors, such as intestinal obstruction, congenital megacolon and other diseases caused by abnormal defecation, the baby is accompanied by stopping gas, abdominal distension, abdominal pain and other symptoms, need to go to the hospital pediatrics, improve the abdomen ultrasound and other related examinations to clarify the condition, and give timely symptomatic treatment. The baby did not poop for two days, need to be analyzed according to the child’s specific symptoms, if necessary, timely consultation, to avoid delaying the condition.