Three months baby three days without poop, may be a normal phenomenon, but may also be related to pathological factors, such as constipation and other conditions. 1. Normal phenomenon: if three months baby three days do not poop, but after the self defecation is more fluent, and feces is not dry, at the same time not accompanied by defecation difficulties and other symptoms, usually a normal physiological phenomenon, more without special treatment. 2. constipation: three months baby does not poop, may also be related to constipation, when the baby occurs constipation, may also be accompanied by defecation difficulties, stool dryness and other symptoms. At this time, you can generally first from the habits of adjustment, such as giving the baby appropriate water, you can also let the baby to carry out some passive activities to promote intestinal peristalsis. In addition, if after the above methods of treatment is still not relieved, or the emergence of other uncomfortable symptoms, should promptly seek medical attention to identify the cause, and under the guidance of the doctor for treatment.