A child 5 years old without stool for three days is usually due to dietary structure is unreasonable, constipation and so on, usually recommended to adjust the dietary structure, the use of drugs and other treatments. 1. Dietary structure is unreasonable: children 5 years old three days without stool may be due to the recent intake of less food, less water or recent consumption of vegetables, fruits less food, etc., usually recommended to adjust the dietary structure, drink more water, eat more dietary fiber-rich foods, such as grains, vegetables, fruits, etc.. Every day to ensure that the intake of adequate food. 2. constipation: children 5 years old three days without stool may be due to constipation, may also be accompanied by bloating, bad breath, loss of appetite and other symptoms, at this time it is usually recommended to use bifidobacteria and other probiotic medications, if necessary, can also be used to treat the medication, such as Keseru. If a child is 5 years old and has not had a bowel movement for three days, or if the symptoms persist and do not improve, he or she should go to the hospital for treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.