3 months old baby 3 days without poop may be normal physiological factors, may also be poor digestive function, can be adjusted through the mother’s dietary structure, massage, oral medication and other methods of treatment. 1. Normal physiological factors: 2 to 3 months old babies, the frequency of defecation itself will be significantly reduced, some breastfed babies may only every 3 to 4 days will have a bowel movement. As long as the baby is feeding well and gaining weight normally, there is no need to be overly nervous. 2. Indigestion: (1) Adjustment of dietary structure: Breastfed babies can improve their symptoms by adjusting their dietary structure, letting their mothers eat more vegetables with coarse fiber, drinking more water and more foods rich in vitamins and proteins. (2) Massage: you can massage the baby’s abdomen in a clockwise direction to promote peristalsis of the gastrointestinal tract, which is conducive to the discharge of stools. (3) Probiotics: If after the above methods, the child still has not had a bowel movement, you can give the child oral intestinal probiotics to regulate the intestinal flora. It should be noted that the drug should be used under the guidance of a physician, avoid unauthorized use of drugs, so as not to cause adverse effects. 3 months old baby 3 days do not poop after the above methods, continued for more than 5 days has not defecation, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease, symptomatic treatment.