Patient: examination and laboratory tests: BLD blood 3+ Treatment: had a kidney biopsy diagnosed as mild lesional glomerulonephritis Current medication Nephrolithiasis Siwei capsule Jin Shui Bao capsule Hematuria capsule History: found hematuria 7 months, no symptoms only things people have lost weight, laboratory tests have hematuria Want to know how it is caused by hematuria what is the main cause; what to pay attention to; how to treat the hematuria? Shen Tong, Department of Pediatrics, Xiamen Maternal and Child Health Hospital: The cause of the child’s hematuria is clear: it is due to inflammation of the glomerular vessels, inflammation of the vessel walls, and increased permeability, which causes the red blood cells in the blood to leak into the urine. There is no particularly effective treatment, and attention should be paid to immune regulation and reducing infections and allergies.