Is pediatric nephrotic syndrome contagious?

Written by Yao Li Qin
Pediatrics
Updated on May 08, 2025
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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.

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Written by Zhou Qi
Nephrology
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How to maintain health with nephrotic syndrome

Patients with nephrotic syndrome should pay attention to maintenance because nephrotic syndrome is a chronic disease. Even if the condition is well controlled, it can still recur or worsen under certain circumstances. First and foremost, patients should avoid various inflammations, including infections of the upper respiratory tract, enteritis, skin infections, ulcers, etc. Patients should avoid getting cold, avoid contact with people who have colds, and wear masks in crowded places. Avoid eating raw, unhygienic food to prevent diarrhea and enteritis. Patients should also limit their salt intake, and it is recommended that their daily salt intake be controlled between 3 and 6 grams.

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Written by Zhou Qi
Nephrology
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Nephrotic syndrome urine output

Patients with nephrotic syndrome vary in the amount of urine they produce. Some patients have normal urine output and may not exhibit obvious symptoms of edema, but others may have reduced urine output, which can even lead to acute renal failure. Nephrotic syndrome emphasizes that the glomerular filtration barrier is damaged, resulting in a large amount of urinary protein, with a 24-hour urinary protein quantitative exceeding 3.5 grams. This situation highlights the decreased ability of the filtration barrier to retain proteins in the blood, meaning the integrity of the filtration barrier is compromised. However, the kidney's ability to excrete water and metabolic waste is not indicated by the term "nephrotic syndrome" itself, thus the patient's urine output can vary.

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Written by Wu Ji
Nephrology
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What is nephrotic syndrome?

Nephrotic syndrome is a common manifestation of glomerular disease, caused by a variety of etiologies, with large differences in treatment response and prognosis. The pathological causes of nephrotic syndrome are diverse, with the most common types being minimal change disease, focal segmental glomerulosclerosis, mesangial proliferative nephritis, membranous nephropathy, and membranoproliferative glomerulonephritis. Nephrotic syndrome can be classified into primary and secondary types based on its cause. The diagnosis of primary nephrotic syndrome mainly depends on the exclusion of secondary nephrotic syndrome. Common causes of secondary nephrotic syndrome include diabetic nephropathy, lupus nephritis, renal amyloidosis, drug-induced nephropathy, and renal tumors.

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Written by Zhou Qi
Nephrology
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Is nephrotic syndrome nauseating?

Nephrotic syndrome generally does not cause symptoms of nausea. Nephrotic syndrome refers to the damage to the glomerular capillaries of the patient, with the patient's 24-hour urinary protein quantification exceeding 3.5 grams, which indicates a substantial presence of urinary protein. This disease can cause edema in various parts of the body, such as the lower limbs, eyelids, and facial area. However, it generally does not cause digestive symptoms such as nausea and vomiting. If a patient exhibits such symptoms, it is necessary to be cautious as it may indicate the onset of acute renal failure due to nephrotic syndrome, or the presence of acute inflammation in the gastrointestinal tract. Patients with nephrotic syndrome generally may experience edema in the gastrointestinal tract, which could cause nausea, and it is important to be cautious of the possibility of other underlying causes.

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Written by Zhou Qi
Nephrology
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Is nephrotic syndrome prone to recurrence?

Nephrotic syndrome is characterized by more than 3.5 grams of proteinuria in 24 hours and a serum albumin concentration lower than 30 grams per liter. Treatment of this disease should be aimed at the cause, with most patients suffering from primary nephrotic syndrome related to immune dysfunction, therefore often requiring treatment with steroids. Indeed, some patients easily experience relapses; after a period of steroid treatment, proteinuria may decrease or even turn negative. However, upon cessation of the medication or during occurrences like a cold, some patients may suffer from relapses. Not all patients respond this way, as some are dependent on steroids.