6-month-old babies 4 days without stool is usually caused by dietary irrationality, gastrointestinal dysfunction and other conditions, can be adjusted through diet, the use of probiotics, etc. for treatment. 1. Irrational diet: 6-month-old babies 4 days without stool may be due to dietary irrationality, such as the recent low water intake, as well as add supplemental food with high protein content and relatively low crude fiber content and so on. At this time, it is usually recommended to let the baby drink more water, eat more vegetables, fruits and so on. 2. gastrointestinal dysfunction: 6 months baby appeared 4 days without stool may be due to gastrointestinal dysfunction, usually recommended the use of bifidobacteria, bacillus subtilis bifidus and other probiotics for treatment. If a 6-month-old baby’s symptoms of no bowel movement for 4 days persist and do not improve, the patient should promptly go to the hospital for treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.