Why does a woman's urine have foam?

Mar 24, 2025 Source: Cainiu Health
Disease description:

Recently, I noticed that there are many bubbles in my urine, and they take a long time to dissipate. I'm a bit worried that something might be wrong with my body and would like to know what could be causing this.

Doctor's answer (1)
Dr. Cao Zhiqiang

Foamy urine in women may be caused by rapid urination after prolonged urine retention, insufficient water intake, or concentrated urine due to excessive perspiration. Foam caused by these factors usually disappears after rehydration. Excessive protein intake or strenuous exercise can temporarily increase protein in the urine, which may also lead to foamy urine.

In addition, with urinary tract infections, increased white blood cells in the urine may produce foam. When symptoms such as urgency, frequency, and painful urination accompany foamy urine, a urinary system infection should be considered. Increased protein content in urine due to kidney diseases such as nephritis or nephrotic syndrome can lower the surface tension of urine, resulting in foam. Diabetic patients may also develop foamy urine due to increased sugar content in their urine.

Foamy urine caused by physiological factors generally does not require excessive concern, and timely adjustment can help improve the condition. For foamy urine caused by diseases, it is recommended to seek medical treatment for targeted therapy. If any physical discomfort occurs, it is advisable to visit a hospital promptly and follow medical instructions for appropriate management.