Symptoms of food retention in 4-year-olds generally include digestive discomfort and emotional and sleep symptoms. 1. Digestive discomfort symptoms: 4-year-old children with food retention are usually accompanied by a lack of appetite, eating less, abdominal distension, vomiting and other discomforts, and may also have a reduced stool frequency, dry and hard stools and other symptoms, and even heartburn, belching and other symptoms. 2. Emotional aspect: the child’s accumulation of food leads to physical discomfort, affecting the child’s mood, can show easily irritable, easy to cry and poor mental state and other symptoms. 3. Sleeping: Children’s accumulation of food easily interferes with normal sleep, leading to a decline in sleep quality and affecting the normal growth and development of the child. It is recommended to consult a doctor in time to clarify the specific causes and then give symptomatic adjustment or treatment as soon as possible to avoid delaying the condition.