Nephrotic syndrome is a clinical condition marked by significant proteinuria, hypoalbuminemia, hyperlipidemia, and edema, predominantly affecting children aged 2-6 years, with a higher prevalence in males. The syndrome can be primary, resulting from glomerular disorders, or secondary due to systemic diseases like infections and malignancies. Management includes corticosteroids, diuretics, and dietary modifications, along with careful nursing care to prevent infection and monitor the child's condition.