Final answer:
The most common nephrotic symptom in children is proteinuria, which occurs when the glomerulus in the kidney is damaged. Treatment may involve medications, managing associated conditions, and reducing sodium intake.
Step-by-step explanation:
Proteinuria occurs when the glomerulus in the kidney is damaged, allowing a large amount of protein from the blood to enter the urine. Symptoms of nephrotic syndrome, which is often associated with proteinuria, include swelling, low serum albumin levels, and high cholesterol levels.
The treatment for proteinuria in children depends on the underlying cause. It may involve medications to reduce protein levels in the urine, as well as managing any associated conditions such as diabetes or high blood pressure. Controlling these conditions can help slow down kidney damage. Additionally, reducing sodium intake can also be helpful. Therefore the most common nephrotic symptom in children is proteinuria, which is the presence of protein in the urine.