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Lupus Nephritis: Symptoms, Causes, and Treatments

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Lupus nephritis, a kidney inflammation caused by systemic lupus erythematosus (SLE), can lead to kidney damage.

Written byDr. Chithranjali Ravichandran

Medically reviewed byDr. C. Elanchezhian

Published At July 14, 2021
Reviewed AtNovember 10, 2025

Introduction:

Lupus nephritis is a primary kidney disease that emerges from SLE and primarily damages the kidney tissues. As a result of the condition, there will be inflammation and low kidney capacity, which can develop into kidney failure when left untreated. Rapid diagnosis is necessary because proper medical treatment can prevent complications and preserve the condition of the kidney. People with lupus nephritis, or those caring for someone with it, often recognize the physical symptoms that appear as the condition progresses. This article will guide you through everything you need to know about lupus nephritis in a way you can easily understand.

What Is Lupus Nephritis?

Lupus (an autoimmune condition) results in kidney damage, which medical experts recognize as lupus nephritis. The kidney is an essential organ that removes waste products and excess liquid elements from the blood circulation. Lupus nephritis has several stages. Doctors diagnose patients at levels between mild and severe. The severity of the disease in lupus depends on the level of kidney damage the patient has experienced. Kidney disease affects people differently because some patients report minor symptoms while others encounter threatening conditions that require hospital treatment.

What Are the Symptoms of Lupus Nephritis?

Lupus nephritis symptoms can vary from person to person, but some of the most common signs include:

  • Swelling in the legs, ankles, and feet.
  • Foamy urine (due to protein leakage).
  • Blood in the urine (a sign of kidney damage).
  • High blood pressure.
  • Frequent urination at night.
  • Fatigue and weakness.
  • Lupus nephritis pain (in the lower back or sides).

Lupus nephritis symptoms in females may also include hormonal imbalances and more severe swelling, especially during menstruation.

What Are the Causes and Risk Factors of Lupus Nephritis?

Medical experts and researchers struggle to determine the cause of the development of lupus nephritis. However, certain factors may increase the risk, including

  • Genetics - If someone in your family has lupus, you may be more likely to develop it.
  • Autoimmune Response - Lupus causes the immune system to attack healthy kidney cells.
  • Infection - A viral infection can trigger lupus nephritis in some individuals.
  • Environmental Factors - UV (ultraviolet) light, stress, and contact with environmental toxins can also contribute.
  • Hormones- Women are likely to develop lupus nephritis through hormonal effects.

How Is Lupus Nephritis Diagnosed?

Doctors require several tests to confirm a lupus nephritis diagnosis when this condition is under consideration.

Urine Testing - Test for protein in urine.

Blood Tests - These show creatinine levels that measure kidney function.

Biopsy - Medical personnel perform an extraction of kidney tissue for microstructural evaluation.

Imaging - Doctors use ultrasound or magnetic resonance imaging scans to study kidney health during the evaluation.

Timely diagnosis of kidney diseases at an early stage prevents harmful tissue damage.

What Are the Complications of Lupus Nephritis?

When ignored, lupus nephritis causes significant health problems, which include:

Chronic Kidney Disease (CKD): Progressive loss of kidney function. The failure of the kidneys might force patients to need dialysis while possibly requiring a kidney transplant for survival.

High Blood Pressure: Damaged kidneys can lead to hypertension.

Fluid Buildup: This causes swelling in different parts of the body.

Heart Disease: Lupus can increase the risk of heart disease due to high blood pressure and kidney damage.

What Are the Treatment Options for Lupus Nephritis?

The main objective of lupus nephritis treatment is to prevent the disease's progression and reduce the inflammation of the kidneys. General management includes

Medications:

Corticosteroids reduce inflammation rapidly.

Mycophenolate mofetil (MMF) and Azathioprine (AZA) are two medications that manipulate the immune system's performance.

Individuals with hypertension (high blood pressure) must take ACE inhibitors (angiotensin-converting enzyme inhibitors) and ARB medications (angiotensin II receptor blockers).

Lifestyle:

When following a lupus nephritis diet, people must consume food with low sodium content, low protein levels, and high amounts of fruits and vegetables. People with lupus nephritis need to follow a hydration routine and avoid alcohol and caffeine consumption. People use meditation and yoga to control their stress levels.

Advanced Treatment:

Plasmapheresis: It acts as a procedure for extracting dangerous antibodies from the blood circulation.

Dialysis: It is necessary in cases of severe renal failure.

Kidney Transplantation: Due to complete impairment in renal function, kidney transplantation will be a possible treatment option.

What Can You Expect While Living With Lupus?

You should follow your doctor’s advice. Lupus patients must take all the prescribed medication at the right time. Proper kidney performance depends on consuming foods that benefit renal health. Using appropriate levels of painkillers is a valuable method of controlling lupus pain symptoms. Joining support groups allows you to receive emotional support from individuals with lupus nephritis. The use of modern medical technologies has resulted in increased quality of life for patients with lupus nephritis. A proper treatment regimen allows most patients to live healthily for a long time.

Conclusion

Joint medical monitoring with specialist treatment should be given indefinitely to patients with lupus nephritis due to its complex nature. Initial diagnosis and proper medical treatment improve the quality of life and symptom reduction. People who have lupus nephritis need consultation with a team of health professionals. They will guide them to follow their medical treatment with the necessary lifestyle adjustments for disease management.

A Note from iCliniq

Systemic lupus erythematosus (SLE) leads to the development of the critical kidney disorder lupus nephritis. iCliniq medical experts offer medical guidance, patient treatment protocols, and ongoing support. Visit icliniq.com to schedule an online consultation with a specialist today.

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Frequently Asked Questions

Lupus nephritis is classified into the following stages: 
Class I: Minimal mesangial lupus nephritis.
Class II: Mesangial proliferative lupus nephritis.
Class III: Focal lupus nephritis.
Class IV: Diffuse proliferative lupus nephritis.
Class V: Membranous lupus nephritis.
Class VI: Advanced sclerosing lupus nephritis.   
Yes, individuals with lupus nephritis can survive with proper treatment and management. The severity and progression of lupus nephritis vary, and early diagnosis and treatment can improve outcomes and quality of life. Regular monitoring by a doctor and lifestyle changes, such as maintaining a healthy diet and avoiding triggers, can also help manage the condition.
Lupus nephritis is most commonly found in people with systemic lupus erythematosus (SLE). Women of childbearing age (15 to 44 years) are at the highest risk, but the disease can occur in people of any age, race, or gender.
Yes, lupus nephritis is a serious condition and can lead to kidney failure if left untreated. Early diagnosis and treatment are important to prevent or minimize kidney damage.
Lupus nephritis can be serious and potentially fatal if left untreated, but with prompt and proper treatment, many people with lupus nephritis can lead full and healthy lives.
The progression of lupus nephritis can vary greatly among individuals and can range from slowly progressing over many years to rapidly advancing within a matter of months. Early diagnosis and prompt treatment can help slow down the progression of the disease. However, factors such as the severity of the underlying autoimmune disorder, other medical conditions, and response to treatment can also impact the progression of lupus nephritis.
Lupus nephritis patients should avoid sun exposure or UV radiation. Certain medications (for example, non-steroidal anti-inflammatory drugs), alcohol and tobacco, foods high in salt, dehydration, infections, and stress. Patients need to follow their doctor's advice and treatment plan for managing their lupus nephritis.
The life expectancy of a person with lupus nephritis varies depending on several factors, such as the severity of the disease, the presence of other medical conditions, and the effectiveness of treatment. With proper treatment, many people with lupus nephritis can live relatively normal lives. However, kidney failure and other complications can significantly reduce life expectancy in severe cases. It is important for individuals with lupus nephritis to closely monitor their health and work closely with their healthcare provider to manage their condition.
To determine if lupus nephritis is affecting the kidneys, the following tests and examinations can be done:
- Urine Tests: Detect protein or blood in the urine.
- Blood Tests: To measure kidney function and check for anemia.
- Biopsy: To examine a small tissue sample of the kidney.
- Imaging Tests: With the help of an ultrasound abdomen and computerized tomography, the kidneys visualization is possible.
- Physical Examination: To check for swelling, high blood pressure, and changes in skin and eyes.
Lupus nephritis can cause discomfort and pain, but it varies from person to person. Painful symptoms are often related to inflammation and swelling in the affected kidney. It is essential to get medical attention if they experience persistent pain or other symptoms of lupus nephritis.
The final stage of lupus nephritis is an end-stage renal disease (ESRD), characterized by complete or nearly complete loss of kidney function and the need for dialysis or a kidney transplant. 
Here are some ways to reduce the risk of lupus nephritis flare-ups: 
- Follow the medication plan as prescribed by a doctor.
- Get regular check-ups and blood tests.
- Avoid triggers such as sun exposure, stress, and certain medications.
- Eat a healthy and balanced diet.
- Get enough rest and exercise.
- Quit smoking, and limit alcohol intake.
- Avoid infections by practicing good hygiene.
The best medication for lupus nephritis will vary based on individual circumstances and the severity of the condition, but some commonly used drugs include: 
- Steroids (for example, Prednisone).
- Immunosuppressants (for example, Azathioprine, Mycophenolate mofetil, Cyclophosphamide).
- Biologic drugs (for example, Belimumab, Rituximab).
The following blood tests can indicate lupus nephritis:
- Complete blood count (CBC).
- Urea and creatinine (kidney function tests).
- Urinalysis.
- Proteinuria and microalbuminuria.
- Serum complement levels.
- Anti-dsDNA antibodies.
- Antiphospholipid antibodies.
- C3 and C4 levels (complement proteins).

A complete cure for lupus nephritis exists only through early identification followed by suitable medical interventions, even though a final resolution is impossible. Immunosuppressive medications, corticosteroids, and biological therapies help control inflammation and prevent kidney damage.

The long-term outlook for lupus nephritis varies depending on the disease's severity, treatment response, and individual health factors. With early diagnosis and proper management, many patients achieve remission (fewer symptoms) and maintain stable kidney function.

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Dr. C. Elanchezhian from iCliniq
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