8-month-old babies three days without poop is usually due to low food intake or gastrointestinal tract dysfunction, etc. It is recommended to increase the amount of food intake, oral medication for treatment. 1. Eating less: If the 8-month-old baby in recent days due to illness and other reasons lead to decreased appetite, eating less, intestinal food residue is too small, there may be three days do not poop situation, it is usually recommended that a small amount of meals to increase the amount of appropriate food. 2. gastrointestinal tract dysfunction: 8 months baby three days no poop may also be due to gastrointestinal tract dysfunction, usually accompanied by abdominal pain, bloating and other symptoms, it is recommended that the use of bifidobacteria and other probiotic medication to regulate, if necessary, can be used to promote the use of Keseru defecation. There are other reasons why 8-month-old babies don’t poop for three days, such as functional constipation, etc., and they should go to the hospital in time for treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.