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Proteinuria (Protein in Urine)
Proteinuria means protein is leaking into the urine, often the earliest sign of kidney damage. Small amounts can be harmless, but persistent protein needs assessment.
Causes & risk factors
- Diabetes and high blood pressure
- Glomerulonephritis or nephrotic syndrome
- Urinary infection
- Fever, heavy exercise or dehydration (temporary)
- Some heart and immune conditions
Common symptoms
- Frothy or foamy urine
- Swelling of legs or face
- Often no symptoms — found on urine testing
- Tiredness
Tests & diagnosis
- Urine dipstick and albumin-to-creatinine ratio
- 24-hour urine protein
- Creatinine
- Kidney function (RFT)
- Albumin
Treatment & management
- Finding and treating the cause (diabetes, BP, kidney inflammation)
- Kidney-protective blood pressure medicines to reduce protein loss
- Good blood sugar and blood pressure control
- Reducing salt in the diet
- Regular monitoring of urine protein and kidney function
When to see a doctor urgently
- Persistent frothy urine
- Protein found on a urine test with swelling
- Protein with diabetes or high blood pressure
- A rising creatinine alongside protein loss
Not a diagnosis. MedDroid gives general educational information about proteinuria (protein in urine). It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Is protein in urine always serious?
Not always — fever, exercise or dehydration can cause a temporary rise. Persistent protein, though, is an important early marker of kidney disease and should be checked.
How is proteinuria measured?
A urine dipstick screens for it, and an albumin-to-creatinine ratio or 24-hour urine collection measures how much protein is being lost.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.