Baby a few days without poop may be a normal physiological phenomenon, but also may be related to indigestion, intestinal obstruction, hypothyroidism and other diseases, this kind of belongs to the abnormal. 1. physiological phenomenon: due to the baby’s gastrointestinal function is not well developed, defecation is not regular, there may be a baby a few days do not poop phenomenon, generally have no effect on the baby’s health, is a normal phenomenon. Secondly, babies do not poop for a few days may also be eaten or drink less water, etc., improve the diet can be improved. 2. Pathological phenomenon: baby indigestion, intestinal obstruction or hypothyroidism and other diseases may lead to the baby a few days without poop, this kind of belongs to the abnormal phenomenon caused by pathological factors, need to consult a doctor in time. There are many possible reasons why a baby does not poop for a few days, you should go to the pediatrics department of a regular hospital to investigate the cause of the disease, and give targeted treatment as soon as possible.