7-month-old babies who have not pooped for 3 days are often caused by irrational dietary structure, indigestion, etc. It is recommended to adjust the dietary structure, general treatment, oral medication. 1. Dietary structure is not reasonable: 7-month-old baby if the recent eating, drinking less water, or supplemental food intake of dietary fiber food is relatively small, etc., may lead to three days without stool, it is usually recommended to adjust the diet, increase the amount of feeding, supplemental food to let the baby to eat more food containing dietary fiber, can alleviate the symptoms. 2. indigestion: indigestion may also make the 7 months baby appeared 3 days no poop situation, parents can give the baby clockwise massage abdomen, promote intestinal peristalsis, at the same time the use of bifidobacteria and other probiotic medication to regulate, oral compound pepsin powder to help digestion, the use of corkscrew to promote defecation when necessary. If your 7-month-old baby has not had a bowel movement for three days and the symptoms continue without improvement, you should go to the hospital in time for treatment. The above medication should be used under the guidance of a doctor, avoid self-medication.