One-month-old babies two days without poop can be seen in physiological phenomena, pathological conditions (such as constipation), whether it is normal need to be analyzed in conjunction with the baby’s situation, such as the existence of constipation is not normal. 1. Physiological phenomenon: the age of the baby is formula-fed, can be 1 ~ 2 days or so to relieve a stool, so for the above baby, such as compared with the previous defecation habits are not obvious changes, and no dry stool, defecation difficulties in the phenomenon, usually considered normal. 2. Pathological conditions: if the baby used to defecate several times a day, such as 3~5 times, and the phenomenon of not defecating for two days, it is often considered to be a significant delay in the interval between defecation, there may be symptoms of constipation, and some of the babies may be accompanied by dry stools, affecting defecation, and abdominal discomfort, etc., which is often considered to be abnormal, and intervention is required if necessary. It is recommended to consult a specialist for assessment and intervention if necessary.