Foamy Urine

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Medically Reviewed By:

Jason Chandrapal

Jason Chandrapal, MD

Urology

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Content updated on Sep 6, 2022

About the symptom

Foam is a substance made by trapping air or gas bubbles inside a liquid and foamy urine is when this process occurs while urinating. During urination a thin air bubble filled layer forms on top of the urine. Most causes foamy urine are normal such as when you have a full bladder or are dehydrated. However persistent foamy urine may due to excessive protein in your urine which may indicate more serious issues such as kidney problems.

When to see a doctor

Seek professional care if you experience any of the following symptoms

  • Eyelid edema

  • Constipation

  • Lower leg edema

  • Gross hematuria

  • Difficulty breathing / breathlessness

  • Unexplained weight loss of 5% or more in 1 month

  • Recent weight loss

  • Respiratory wheeze

  • Facial edema

  • Edema

Possible causes

  • Diabetes mellitus (DM)

    A disease where blood sugar levels are abnormally high, due to problems with insulin production or resistance. There are often no symptoms until the condition has worsened, hence regular screening is important.

  • Nephrotic syndrome

    A condition in which the kidneys are damaged and leak protein. Common causes are autoimmune (body's immune system attacks itself) and diabetic kidney disease.

  • Amyloidosis

    A disease where "amyloid", an abnormal type of protein, is deposited and builds up in various organs and damages them. The affected areas can include the heart, kidneys, and gastrointestinal tract. The causes are diverse.

  • Alport syndrome

Questions your doctor may ask about this symptom

Your doctor may ask these questions to check for this symptom

  • Have you noticed that your urine is foamy?

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