Can indigestion in children cause fever?

Indigestion in children may cause fever. This type of fever—often termed “food retention–induced low-grade fever”—is a relatively common physiological fever among children, typically occurring after excessive strain on the spleen and stomach.

If a child experiences recurrent, persistent fever accompanied by lethargy and markedly reduced appetite, prompt medical evaluation is essential to identify the underlying cause and initiate appropriate treatment.

Children’s spleen and stomach functions are still immature, resulting in relatively weak digestive capacity. Consuming excessive amounts of high-protein, high-calorie foods within a short period can lead to prolonged food stagnation in the gastrointestinal tract, preventing timely digestion. Such food retention gradually generates internal heat (“stagnant heat”), impairing normal heat dissipation and causing mild elevation in body temperature. Typical accompanying symptoms include abdominal distension, halitosis (foul breath), and constipation. Unlike infectious fevers caused by bacteria or viruses, this type of fever usually remains low-grade; once food retention resolves, body temperature typically returns to normal spontaneously.

Failure to address food retention–induced fever over time may further compromise the child’s immune function. Prolonged gastrointestinal dysfunction disrupts metabolic balance, leading to transient immunosuppression and increased susceptibility to bacterial or viral infections—particularly of the respiratory or gastrointestinal tracts. In such cases, fever may suddenly spike and persist at high levels, transforming simple food retention–related fever into infection-associated fever, thereby worsening the child’s discomfort and prolonging overall recovery.

Parents should routinely monitor and moderate their child’s portion sizes per meal and adhere to principles of light, easily digestible diets. Encouraging gentle physical activity after meals and maintaining regular sleep-wake cycles help support healthy spleen and stomach function—effectively preventing food retention–induced fever.