Fungus is rarely seen in young children’s stools, and if it is present, it may be related to specimen contamination or fungal infection caused by long-term application of antibiotics, hormones, immunosuppressants, etc. Fungi are rarely seen in normal human feces. If the specimen is contaminated by fungi before the test, it may cause false-positive results. If there are no other abnormal symptoms such as diarrhea, it is necessary to exclude the interference of specimen contamination and re-collect the specimen for the test. If caused by human intestinal fungal infection, it is usually mainly due to long-term application of antibiotics such as erythromycin, glucocorticoids such as dexamethasone, immunosuppressants such as methotrexate, leading to intestinal flora disorders, intestinal dysbiosis and other causes of fungal infections related. When fungi appear in the stool of young children, the cause needs to be clarified under the guidance of a doctor, so that timely diagnosis and active treatment can be made.