The kidney filters waste products and unwanted substances from the blood. These waste products end up in the urine. Proteins, especially albumin, are an important part of the blood and aren't filtered out. Normally, there is no protein in the urine.
Proteinuria occurs when some of the normal protein in the bloodstream ends up in the urine. Protein in the urine will show up on a standard urine test.
Protein in the urine can be a sign of serious disease or a harmless short-term (temporary) condition. For example, heavy exercise or fever can cause temporary proteinuria. This is normal and will go away if the urine test is repeated.
If urine tests continue to show protein in the urine, you may have chronic kidney disease. Common causes of kidney disease include diabetes, high blood pressure, and conditions that cause inflammation in the kidneys.
Protein in the blood helps keep fluids from leaking out of the blood vessels and into the surrounding tissues. Mild or temporary proteinuria doesn't cause any symptoms. But if too much protein is lost from the body, you may notice swelling. It usually appears in the legs, feet, and ankles. Or it may be in the lower back, face, and eyelids.
If proteinuria shows on repeat urine testing, you'll need more tests to figure out the cause. If the cause is still unclear, you may need to see a kidney specialist.
Home care
No special home care is needed until the cause of your proteinuria is known.
Follow-up care
Follow up with your provider, or as advised.
Call 911
Call
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You have severe weakness, dizziness, fainting, drowsiness, or confusion.
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You have chest pain or shortness of breath.
When to contact your doctor
Contact your provider right away if:
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You have nausea or vomiting.
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You have unexpected weight gain or swelling in the legs, ankles, or around the eyes.
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You have dark-colored urine.
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You have decreased or absent urine output.
