Proteinuria is a condition in which there is too much protein in the urine. Normally, proteins stay in the blood and do not pass into urine. When protein is detected in urine, it often signals that the kidneys are damaged or under stress.

At Carolina Nephrology, PA, we specialize in diagnosing and treating proteinuria, helping patients protect their kidney health and reduce the risk of developing end-stage renal disease (ESRD).

Who Is at Risk for Proteinuria?

Certain health conditions and family backgrounds increase the risk of proteinuria.

Diabetes

Diabetes is the leading cause of ESRD in the United States. In both type 1 and type 2 diabetes, proteinuria often begins with small amounts of protein (albumin) leaking into the urine — a condition called microalbuminuria. As kidney function worsens, albumin levels increase, progressing to full proteinuria.

High Blood Pressure

High blood pressure (hypertension) is the second most common cause of ESRD. Proteinuria in a person with high blood pressure is an important warning sign of declining kidney function. If blood pressure remains uncontrolled, the condition may progress to kidney failure.

  • African Americans are six times more likely than Caucasians to develop hypertension-related kidney failure, even when blood pressure elevation is mild.

Heredity and Other Risk Factors

  • American Indians, Hispanic/Latinos, and Pacific Islander Americans
  • Older adults
  • Overweight individuals
  • People with a family history of kidney disease

These groups should have their urine tested regularly to detect proteinuria early.

Symptoms of Proteinuria

Proteinuria often has no noticeable symptoms, which is why regular testing is essential. When symptoms occur, they may include:

  • Foamy or bubbly urine

  • Swelling in the hands, feet, stomach, or face

  • Shortness of breath caused by fluid around the lungs

Symptoms of Proteinuria

At Carolina Nephrology, PA, we use several tests to diagnose proteinuria and identify its underlying cause:

  • Urinalysis to measure protein levels
  • Blood tests to check for waste buildup (creatinine, urea nitrogen)
  • Kidney biopsy if more detailed evaluation is needed

These tests help us determine whether proteinuria is related to diabetes, high blood pressure, or another kidney condition such as glomerulonephritis.

Treatment Options

Treatment focuses on controlling the underlying cause and protecting kidney function.

  • Diabetes Management: Monitoring blood sugar, following a healthy diet, exercising, and taking prescribed medications.

  • Blood Pressure Control:

    • Target blood pressure of below 130/80 mm Hg
    • Use of ACE inhibitors or ARBs, which protect the kidneys beyond lowering blood pressure
    • Additional medications, such as diuretics (“water pills”), may be prescribed if needed
  • Lifestyle Modifications: Reducing salt and protein in the diet, maintaining a healthy weight, and exercising regularly.
  • Specialized Treatment for Glomerulonephritis: May include chemotherapy-based agents or immunosuppressive medications depending on biopsy results.

At Carolina Nephrology, PA, we also provide referrals to dietitians who can help patients create kidney-friendly eating plans tailored to their needs.

Key Points to Remember

  • Proteinuria is often silent and requires testing to detect.
  • It may be an early sign of chronic kidney disease (CKD) or a warning of progression toward ESRD.

  • At-risk groups (African Americans, American Indians, Hispanic/Latinos, Pacific Islanders, people with diabetes, hypertension, or a family history of kidney disease) should be screened regularly.

  • With proper treatment, including blood pressure and blood sugar control, proteinuria progression can often be slowed or even reversed.

At Carolina Nephrology, PA, our team of nephrologists works closely with patients and their primary care providers to diagnose proteinuria early, manage its underlying causes, and protect kidney function for the long term. To schedule an evaluation or learn more about our proteinuria treatment services, call Carolina Nephrology, PA at (864) 271-1844.