Are bubbles in urine a common sign during pregnancy?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Bubbles or foam in urine during pregnancy may indicate proteinuria (excess protein in the urine), which is not typically normal and warrants evaluation by a healthcare provider. While occasional foam can result from concentrated urine or rapid urination, persistent bubbles can signal conditions like preeclampsia, gestational hypertension, or urinary tract infections that require prompt medical attention to protect both you and your baby.

Because pregnancy symptoms can overlap with more serious conditions, it's smart to get clarity fast. Take a free, instant, online symptom check to better understand what your symptoms may mean and confidently plan your next steps.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Bubbles in urine can sometimes be seen during pregnancy. This might happen if there is protein in the urine, known as proteinuria.

Proteinuria: This is when there is too much protein in the urine. It can be a sign of a problem with the kidneys.
Pregnancy Considerations: According to the references, protein in urine can be important to monitor during pregnancy. It can sometimes mean that the kidneys are working harder than usual.
What to Do: If you see bubbles in your urine while pregnant, it is a good idea to talk to your doctor. They can check to make sure everything is okay.

Remember, it is always best to talk to a healthcare provider if you are worried about anything during your pregnancy. You can also use a free AI symptom checker to better understand your symptoms before your appointment.

(References)

Osathanondh V, & Chinsomboon S. (1990). Urinary excretion of placental male sex-linked protein .... Journal of the Medical Association of Thailand = Chotmaihet thangphaet, 2351923.
Bellinghieri G, Savica V, & Santoro D. (2008). Renal alterations during exercise. Journal of renal nutrition : the official journal of the Council on Renal Nutrition of the National Kidney Foundation, 18089464.
Ambia AM, Seasely AR, Macias DA, Nelson DB, Wells CE, McIntire DD, & Cunningham FG. (2020). The impact of baseline proteinuria in pregnant women with .... American journal of obstetrics & gynecology MFM, 33345986.

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