Nephrotic Syndrome: Patient Guide to Symptoms, Causes, and Management
Nephrotic syndrome is a kidney disorder that causes your body to excrete too much protein in your urine, leading to swelling, high cholesterol, and other complications. This guide explains what nephrotic syndrome is, how it is diagnosed and treated, and how to manage daily life with the condition.
Nephrotic syndrome is a kidney condition marked by excess protein in urine, swelling around the eyes and legs, and high blood cholesterol. It is often caused by damage to the tiny blood vessels in the kidneys that filter waste and fluid, and treatment focuses on managing symptoms and addressing the underlying cause. With proper care, many people with nephrotic syndrome can manage their condition and reduce the risk of long-term kidney damage.
Overview
Nephrotic syndrome is not a single disease, but a group of symptoms caused by damage to the glomeruli — the tiny, delicate blood vessels in your kidneys that filter waste and excess fluid from your blood to make urine. When glomeruli are damaged, they leak large amounts of protein (normally kept in your bloodstream) into your urine, leading to a range of complications. It can affect people of all ages, including children, and early diagnosis and treatment can help prevent permanent kidney damage.
Signs & Symptoms
Symptoms of nephrotic syndrome develop from excess protein loss, fluid buildup, and changes in blood chemistry, and may come on suddenly or gradually depending on the underlying cause.
- Severe swelling (edema) around the eyes, ankles, feet, and abdomen
- Foamy or frothy urine (a visible sign of excess protein)
- Unexplained weight gain from fluid retention
- High blood cholesterol and triglyceride levels
- Low blood albumin levels
- Reduced urine output
- Loss of appetite, nausea, and fatigue
Causes & Risk Factors
Nephrotic syndrome is caused by damage to the glomeruli from underlying conditions, medications, or infections. In children, the most common cause is minimal change disease, while adults most often develop it from focal segmental glomerulosclerosis (FSGS) or membranous nephropathy. You are at higher risk if you have diabetes, lupus, other autoimmune conditions, a family history of kidney disease, or take long-term NSAIDs like ibuprofen.
- Minimal change disease (most common in children; causes abnormal kidney function without visible damage under a standard microscope)
- Focal segmental glomerulosclerosis (FSGS; scarring of parts of the glomeruli, a leading cause in adults)
- Membranous nephropathy (thickening of the glomerular membrane, often linked to autoimmune conditions or hepatitis B)
- Diabetic nephropathy (long-term uncontrolled diabetes that damages kidney blood vessels)
- Systemic lupus erythematosus (lupus; an autoimmune disease that can damage multiple organs including the kidneys)
- Infections including hepatitis B/C, HIV, and malaria
- Long-term use of NSAIDs or certain antibiotics
Diagnosis
Your healthcare provider will diagnose nephrotic syndrome based on your symptoms, medical history, and test results. The first sign is often excess protein found in your urine during a routine checkup.
| Test Type | What It Checks For | What Results May Indicate |
|---|---|---|
| Urine test (urinalysis) | Protein levels in urine | High protein (especially albumin) levels confirm proteinuria, a hallmark of nephrotic syndrome |
| Blood test | Albumin, cholesterol, kidney function (creatinine, eGFR) | Low albumin, high cholesterol, and reduced kidney function support a diagnosis |
| 24-hour urine collection | Total protein excreted in a full day | More than 3.5 grams of protein per day confirms nephrotic-range proteinuria |
| Kidney biopsy | Small sample of kidney tissue examined under a microscope | Identifies the specific cause of glomerular damage, such as FSGS or membranous nephropathy |
Treatment & Management
Treatment focuses on managing symptoms, treating the underlying cause of kidney damage, and preventing complications like blood clots, infections, and permanent kidney failure. Your care team will create a personalized plan based on the cause of your condition, your age, and symptom severity.
- Blood pressure medications (ACE inhibitors or ARBs) to reduce protein loss in urine and protect kidney function
- Diuretics (water pills) to reduce swelling by removing excess fluid from the body
- Cholesterol-lowering statins to manage high blood cholesterol and lower heart disease risk
- Immunosuppressive medications to reduce immune system activity if your condition is caused by an autoimmune disease
- Dietary changes to limit sodium, saturated fat, and (in some cases) protein intake
- Blood thinners if you have a history of blood clots or are at high risk for clotting
Even if your symptoms improve, never stop or adjust your medications without talking to your healthcare provider. Stopping treatment early can cause your condition to relapse, lead to permanent kidney damage, or increase your risk of life-threatening complications like blood clots.
Living With It
Nephrotic syndrome is often a chronic, relapsing condition that requires ongoing care, but many people are able to manage their symptoms effectively and live full, active lives with the right support and treatment plan.
- Work with a registered dietitian to create a kidney-friendly meal plan tailored to your needs
- Monitor your weight daily to track fluid retention, and report sudden weight gains of 2+ pounds in a day to your provider
- Avoid NSAIDs like ibuprofen and naproxen unless explicitly approved by your provider, as they can worsen kidney damage
- Stay up to date on vaccinations for flu, pneumonia, and COVID-19, as infections can trigger symptom flares
- Avoid smoking and limit alcohol intake to reduce strain on your kidneys and heart
- Join a support group for people with kidney conditions to connect with others who understand your experience
Medical Review Team
WellAlly Medical Editorial Team
This content is not a replacement for professional medical advice.
Recovery & management timeline
1-7
Initial Symptom Onset
Track all symptoms (swelling, urine changes, weight gain) and schedule an appointment with your primary care provider or a nephrologist (kidney specialist). Avoid taking NSAIDs like ibuprofen until you speak with your provider.
7-21
Diagnostic Testing
Complete all ordered tests including urine analysis, blood work, and a 24-hour urine collection if requested. Share your full medical history with your provider, and ask questions about what your test results mean.
21-60
Treatment Initiation
Start all prescribed medications exactly as directed. Meet with a registered dietitian to adjust your diet to reduce sodium and fluid intake if needed. Begin daily weight tracking to monitor fluid retention.
60+
Long-Term Management
Attend all scheduled follow-up appointments with your nephrologist to monitor kidney function. Report any new or worsening symptoms immediately, and adjust your lifestyle as needed to reduce strain on your kidneys.
Self-care steps
1Follow a kidney-friendly diet
Limit sodium to less than 2,300 mg per day to reduce swelling, and work with a dietitian to adjust your protein and saturated fat intake based on your kidney function. Avoid processed foods, canned soups, and fast food, which are high in sodium.
2Monitor your weight and symptoms daily
Weigh yourself at the same time each morning, and track any swelling, changes in urine output, or sudden weight gains. Report gains of 2 or more pounds in a single day to your provider, as this may signal fluid retention.
3Avoid kidney-damaging substances
Do not take NSAIDs like ibuprofen or naproxen unless your provider explicitly approves them, as these can worsen kidney damage. Limit alcohol intake, and avoid smoking, which reduces blood flow to the kidneys.
4Stay on top of medications and appointments
Take all prescribed medications exactly as directed, even if your symptoms improve. Attend all scheduled follow-up appointments with your nephrologist to monitor your kidney function and adjust your treatment plan as needed.
5Reduce infection risk
Stay up to date on all recommended vaccinations, wash your hands frequently, and avoid close contact with people who are sick, as infections can trigger flares of nephrotic syndrome.
When to seek medical help
Seek urgent or emergency care immediately if you experience: Sudden severe swelling in your legs or abdomen; difficulty breathing or chest pain (signs of fluid buildup in the lungs or a blood clot); blood in your urine; sudden severe pain in your side or back; fever over 101°F (38.3°C) with chills (sign of a serious infection); or confusion or drowsiness, which may signal electrolyte imbalances or reduced kidney function.
Frequently asked questions
Is nephrotic syndrome curable?
Can I eat normally with nephrotic syndrome?
Will nephrotic syndrome lead to kidney failure?
Can children develop nephrotic syndrome?
Is nephrotic syndrome contagious?
Sources
- 1
- 2Mayo ClinicSource
- 3
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Medical Editorial Team · Last reviewed October 9, 2026. · Read our editorial policy