Newborns a day without poop may be normal, there may also be functional constipation, indigestion, if the latter two can be relieved by massage, taking medication and so on. 1. Normal phenomenon: if the newborn usually less frequent stools, one to two days or even more long time to relieve a stool, and if the mental state does not affect the normal milk, no bloating and crying and other situations, there is no need to worry, is the normal situation. 2. Functional constipation: if the newborn usually defecate 2-3 times a day, a day without bowel movement and abdominal distension, crying and restlessness, to avoid eating the situation, belong to the abnormal phenomenon, there may be functional constipation, you can use probiotics such as bacillus subtilis bacillus, etc. to regulate, to promote defecation. 3. indigestion: the newborn due to eating indigestion, will also cause a day without defecation, in addition to the reduction of defecation will also appear abdominal flatulence, thick and greasy tongue, sleep quality is reduced and other symptoms, you can do the appropriate abdominal massage, but also can be taken orally, such as compound pepsin, etc., to relieve the indigestion of the situation. Newborns who have not pooped for a day need to go to the hospital to consult a doctor to deal with the specific situation. The above medications should be used in accordance with medical advice.