Simple nephropathy is a common disease in pediatrics, equivalent to nephrotic syndrome in children, the most common pathological type of nephrotic syndrome in children is microscopic lesion type, the clinical manifestations of simple nephropathy are mainly large amount of proteinuria, that is, proteinuria is more than 3.5 grams per day, hypoproteinemia, plasma albumin is less than 30g/L, accompanied by edema, hyperlipidemia, etc. The clinical manifestation is not consistent with the hematuria, especially the naked eye hematuria. The clinical manifestation of simple nephropathy is often hematuria, especially hematuria, because simple nephropathy corresponds to the opposite of nephritic nephropathy, nephritic patients often combined with hematuria, a small number of patients will be manifested as hematuria, so the clinical manifestation of simple nephropathy is not in line with the hematuria.