Nephrology

Safety First: Recognizing Emergencies and Complications

At a Glance

In steroid-resistant nephrotic syndrome, sudden chest pain, breathing trouble, one-sided limb swelling, severe headache, confusion, or severe infection signs require emergency care; fever and reduced urine need same-day advice. Follow your written plan and do not change fluids or diuretics alone.

Living with Steroid-Resistant Nephrotic Syndrome (SRNS) often involves managing chronic symptoms like swelling and protein loss. While most days are about routine care, the combination of kidney stress and immune-suppressing medications creates risks for sudden, serious complications.

Understanding what constitutes an emergency—and what is a “normal” part of the syndrome—can help you act quickly when it matters most without unnecessary panic. The best tool you can have is a written, individualized action plan from your nephrology team detailing your specific thresholds for calling the clinic.

Red Flags: When to Go to Local Emergency Services

Certain symptoms indicate a life-threatening crisis that cannot wait for a phone call back from the clinic. If you or your child experience any of the following, seek immediate emergency care:

Signs of a Blood Clot: Nephrotic syndrome significantly increases the risk of thrombosis (blood clots) ^[1].
- In the Lungs (Pulmonary Embolism): Sudden chest pain, shortness of breath, coughing up blood, or fainting ^[2]^[3].
- In the Brain (Cerebral Venous Thrombosis): A severe, unusual headache, visual changes, vomiting, seizures, or any sudden change in consciousness or confusion ^[4].
- In the Limbs (DVT): New swelling, pain, or redness in just one leg or arm (rather than both) ^[5].
Signs of Severe Infection (Sepsis or Peritonitis): Because of protein loss and medications, the body’s ability to fight infection is weakened. Emergency signs include a fever (or an unusually low temperature) combined with severe abdominal pain, vomiting, cold hands and feet, or extreme sleepiness/altered mental status ^[6]^[7].
Severe Dehydration (Hypovolemic Shock): Dizziness where you cannot stand up, confusion, or a heart rate that is much faster than usual ^[8].
Hypertensive Emergency: Markedly high blood pressure accompanied by a severe headache, confusion, or visual changes.

Urgent Concerns: Call Your Nephrologist Today

These symptoms are not necessarily life-threatening in the next hour, but they require a medical evaluation within the same day to prevent them from worsening:

Fever Without Other Symptoms: In a patient on immunosuppressants, a fever should always be reported immediately according to your team’s threshold, even if you “look fine,” because medications can mask the usual signs of a worsening infection ^[9]^[10].
Significantly Reduced Urine: If you notice a “marked” drop or near-absence in urine output, do not wait for a specific number of hours; it could be a sign of Acute Kidney Injury (AKI) ^[11]^[12].
New Skin Infections: Any area of skin that becomes red, hot, or painful (cellulitis) can spread quickly in SRNS patients ^[13].

Managing the “Routine”: Check Your Action Plan

It is common to see fluctuations in this condition, but always refer to your personalized plan rather than relying on generic rules:

Trace or 1+ Fluctuations: Seeing a small change in daily urine protein “dipsticks” (like moving from Trace to 1+) is common and often happens with minor colds or activity; it is the overall trend over several days that matters, though persistent new protein should prompt a call ^[14].
Edema and Weight Changes: If swelling in the ankles or around the eyes stays about the same or increases very slowly, it might be discussed at your next visit. However, sudden rapid weight gain or new breathing difficulty requires prompt attention ^[15].
Expected Side Effects: Minor tremors or a slight increase in hair growth from medications like tacrolimus or cyclosporine are common and should be discussed at your next clinic visit ^[16]. But a new or severely worsening tremor should prompt a call.

Preventive Safety Measures

Vaccinations: Ask your doctor about essential vaccines (like pneumococcal and annual influenza). Note that live vaccines (like MMR or Varicella) are generally restricted while on immunosuppression ^[17].
Avoid Nephrotoxins: Avoid NSAIDs (like ibuprofen or naproxen) unless specifically approved by your nephrologist, as they can stress the kidneys.
A Note on “Underfilling”: Patients with SRNS can be very swollen on the outside but actually “dehydrated” on the inside (intravascularly depleted) ^[18]. This is why you should never increase a diuretic dose, restrict fluids, or force fluids without a doctor’s instruction, as this can trigger a sudden kidney injury ^[19].

Common questions in this guide

Which SRNS symptoms mean I should call emergency services?

Call local emergency services for sudden chest pain, shortness of breath, coughing up blood, fainting, or new swelling and pain in one limb, which can signal a blood clot. Severe unusual headache, vision changes, seizures, confusion, fever with severe abdominal pain, vomiting, cold hands or feet, or unusual sleepiness also require emergency care. Do not wait for a callback from the nephrology clinic.

Why should I report a fever quickly while taking SRNS medicines?

Immunosuppressive medicines can weaken infection defenses and may mask the usual signs of worsening infection. Report a fever promptly using the temperature threshold and care instructions in your nephrology team's plan, even if you otherwise look well.

What should I do if my urine output drops a lot?

A marked decrease or near-absence of urine can be a sign of acute kidney injury and needs medical evaluation the same day. Contact your nephrologist promptly and follow the individualized action plan; use emergency services if severe dizziness, confusion, fainting, or other emergency symptoms occur.

Are swelling and weight gain expected with SRNS?

Some stable swelling and slow weight changes can occur and may be monitored according to your action plan. Rapid weight gain or new breathing difficulty needs prompt medical attention. Do not increase diuretics, restrict fluids, or force fluids without your doctor's instructions because you can be swollen while still having too little circulating fluid.

Which vaccines and over-the-counter pain medicines are safe with SRNS?

Ask your nephrology team about pneumococcal and annual influenza vaccines. Live vaccines such as MMR or varicella are generally restricted during immunosuppressive treatment, and NSAIDs such as ibuprofen or naproxen should be avoided unless your nephrologist specifically approves them.

What are the warning signs of a blood clot with SRNS?

Warning signs include sudden chest pain, shortness of breath, coughing up blood, or fainting, which can indicate a clot in the lungs. A severe new headache, visual changes, seizures, or confusion can signal a clot affecting the brain, while new pain, redness, or swelling in one arm or leg can signal a clot in a limb. These symptoms require immediate emergency care.

What should I prepare before an SRNS emergency happens?

Ask your nephrology team for a written action plan that explains when to call the clinic and when to use emergency services. Keep a current medication list, including immunosuppressants and doses, and learn how to check blood pressure and heart rate if your team recommends home monitoring.

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Curated prompts to bring to your next appointment.

1.Could you provide a written, individualized action plan detailing when I should call the clinic versus when I should go to emergency services?
2.If a fever develops, what is our specific temperature threshold to act on, and where exactly should we go for care?
3.What are the specific 'sick day' rules for our current medications, like ACE inhibitors or tacrolimus, if vomiting or diarrhea occurs?
4.What vaccinations (like pneumococcal and flu) are recommended right now, and which live vaccines should we avoid while on immunosuppressants?
5.What signs of a blood clot should I specifically look for based on our current activity level and risk factors?

Key takeaways

Sudden chest pain, shortness of breath, coughing up blood, fainting, severe neurologic symptoms, or one-sided limb swelling can signal a blood clot and require emergency services.
Fever during immunosuppressive treatment and a marked reduction or near-absence of urine require prompt same-day contact with the nephrology team.
Rapid weight gain or new breathing difficulty needs prompt attention, while diuretics and fluid intake should not be changed without medical instructions.
Small trace-to-1+ urine protein fluctuations and stable swelling may be monitored using an individualized action plan, but persistent new protein should be reported.
Pneumococcal and influenza vaccination should be discussed with the nephrology team, while live vaccines are generally restricted and NSAIDs should be avoided unless the nephrologist approves them.

References (19)

1
Risk of Arterial Thromboembolism, Venous Thromboembolism, and Bleeding in Patients with Nephrotic Syndrome: A Population-Based Cohort Study.
Vestergaard SV, Birn H, Darvalics B, et al.
The American journal of medicine 2022; (135(5)):615-625.e9 doi:10.1016/j.amjmed.2021.11.018.
PMID: 34979093
2
Pulmonary Embolism in Children: A Case Series.
Agrawal S, Shrivastava Y, Bolia R, et al.
Indian journal of critical care medicine : peer-reviewed, official publication of Indian Society of Critical Care Medicine 2020; (24(12)):1272-1275 doi:10.5005/jp-journals-10071-23682.
PMID: 33446985
3
Nephrotic syndrome with acute pulmonary embolism in young adults: Two case reports.
Song Z, Wu H, Cao H, et al.
Medicine 2018; (97(29)):e11495 doi:10.1097/MD.0000000000011495.
PMID: 30024529
4
Cerebral sinovenous thrombosis in children with nephrotic syndrome: systematic review and one new case.
Konopásek P, Piteková B, Krejčová V, Zieg J
Frontiers in pediatrics 2023; (11()):1207871 doi:10.3389/fped.2023.1207871.
PMID: 37691772
5
Multiple Venous and Pulmonary Artery Thrombosis as the Presenting Features of Spontaneously Reversible Nephrotic Syndrome after Exposure to SARS-CoV-2 Virus (Pfizer/BioNTech BNT162b2) Vaccination.
Thammathiwat T, Banjongjit A, Chumnumsiriwath P, et al.
Vaccines 2022; (10(11)) doi:10.3390/vaccines10111888.
PMID: 36366397
6
Managing concurrent nephrotic syndrome, spontaneous bacterial peritonitis, and herpes zoster in an immunocompromised child: Diagnostic difficulties and treatment outcomes.
Adrizain R, Modjaningrat I, Winyarti , et al.
IDCases 2026; (43()):e02489 doi:10.1016/j.idcr.2026.e02489.
PMID: 41551359
7
Incidence and risk factors for major infections in hospitalized children with nephrotic syndrome.
Kumar M, Ghunawat J, Saikia D, Manchanda V
Jornal brasileiro de nefrologia 2019; (41(4)):526-533 doi:10.1590/2175-8239-JBN-2019-0001.
PMID: 31528983
8
Spontaneous bacterial peritonitis among adult patients with ascites attending Korle-Bu Teaching Hospital.
Duah A, Nkrumah KN
Ghana medical journal 2019; (53(1)):37-43 doi:10.4314/gmj.v53i1.6.
PMID: 31138942
9
Streptococcus pneumoniae meningitis in a child with idiopathic nephrotic syndrome: a case report.
Guernsey D, Arun A, Agha R, Kupferman JC
Journal of medical case reports 2022; (16(1)):403 doi:10.1186/s13256-022-03648-5.
PMID: 36336675
10
Diagnostic value of serum CRP, PCT and IL-6 in children with nephrotic syndrome complicated by infection: a single center retrospective study.
Jia W, Dou W, Zeng H, et al.
Pediatric research 2024; (95(3)):722-728 doi:10.1038/s41390-023-02830-9.
PMID: 37773440
11
Epidemiology of Acute Kidney Injury in Critically Ill Children and Young Adults.
Kaddourah A, Basu RK, Bagshaw SM, et al.
The New England journal of medicine 2017; (376(1)):11-20 doi:10.1056/NEJMoa1611391.
PMID: 27959707
12
Oliguria and Acute Kidney Injury in Critically Ill Children: Implications for Diagnosis and Outcomes.
Kaddourah A, Basu RK, Goldstein SL, et al.
Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies 2019; (20(4)):332-339 doi:10.1097/PCC.0000000000001866.
PMID: 30676490
13
Cutaneous Staphylococcus aureus Infections in Renal Edema Across Kidney Disease and the Intensive Care Unit: Pathophysiological Mechanisms, Clinical Implications, and Therapeutic Challenges.
Caragea ME, Caragea DC, Novac MB, et al.
International journal of molecular sciences 2026; (27(13)) doi:10.3390/ijms27136038.
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14
The relatively poor correlation between random and 24-hour urine protein excretion in patients with biopsy-proven glomerular diseases.
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PMID: 27528553
15
Risk factors and renal outcomes of AKI in children with secondary steroid-resistant nephrotic syndrome.
Yu N, Ouyang X, Li J, et al.
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PMID: 38383285
16
Neurotoxicity of cyclosporine A in children with steroid-resistant nephrotic syndrome: is cytotoxic edema really an unfavorable predictor of permanent neurological damage?
Batinić D, Milošević D, Filipović-Grčić B, et al.
Wiener klinische Wochenschrift 2017; (129(15-16)):579-582 doi:10.1007/s00508-017-1221-z.
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17
Seroprotection for Diphtheria, Pertussis, Tetanus and Measles in Children With Nephrotic Syndrome.
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18
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19
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This page provides general information about emergency warning signs and prevention in steroid-resistant nephrotic syndrome; it is for informational purposes only and does not constitute medical advice. Follow your nephrology team's individualized plan and seek emergency care for life-threatening symptoms.

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