Children’s pain below the navel may be due to eosinophilic gastroenteritis, acute appendicitis, etc., you can check the blood routine, stool routine and abdominal ultrasound, gastroenteroscopy and other tests. 1. Eosinophilic gastroenteritis: pain below the umbilicus can occur, at this time the blood routine can show that the blood eosinophil count is elevated, and can fluctuate with the course of the disease. Stool routine is positive for occult blood. Enteroscopy reveals congestion and edema, erosion, hemorrhage, thickening, or lumps in the affected mucosa. Biopsy pathology can be seen in the affected gastrointestinal mucosa with focal or diffuse eosinophilic infiltration, tissue edema and fibrosis; mucosal biopsy pathology eosinophils increased significantly, supporting the diagnosis of eosinophilic gastroenteritis. 2. Acute appendicitis: as the appendix position of children is not yet fixed, it may manifest as pain below the umbilicus; ultrasound examination can find edema and enlarged appendix; routine blood examination can find elevated white blood cells as well as neutrophils, which can be treated by emergency surgery. If children have pain below the navel, they should seek medical attention and choose the appropriate examination program under the advice of the doctor.