Pediatric nephrotic syndrome is a clinical syndrome characterized by increased glomerular filtration membrane permeability due to various causes, leading to the loss of a large amount of protein from plasma through urine. Its main manifestations are: 1. Massive proteinuria, which is the most basic pathophysiological change in nephrotic syndrome and a necessary condition for diagnosis. 2. Hypoalbuminemia. 3. Hyperlipidemia. 4. Significant generalized edema. Nephrotic syndrome is not contagious, so pediatric nephrotic syndrome is not infectious. Contact with children with nephrotic syndrome will not result in contracting the syndrome, so parents can be assured on this matter.