The four-year-old baby three days without poop is considered to be functional constipation, can be adjusted through the diet, medication to treat. Four-year-old baby three days without poop may be functional constipation, this situation can follow the doctor’s advice to the baby to use Keseru and other drugs to relieve the symptoms of constipation. Parents should also pay attention to adjust the baby’s diet, let the baby eat more vegetables, fruits. In addition, you can also follow the doctor’s advice to use bifidobacteria capsules and other probiotic preparations, by improving the intestinal microenvironment to improve the symptoms. If the four-year-old baby did not poop for three days, it is recommended to take the baby to the doctor in order to identify the specific cause, follow the doctor’s instructions for appropriate treatment, do not self-medication.