What causes foam in urine?

Foam in urine may be caused by factors such as rapid urination, concentrated urine, urethritis, glomerulonephritis, or diabetes. It is recommended to seek medical attention promptly, identify the underlying cause, and receive appropriate symptomatic treatment under the guidance of a healthcare professional. Specific analyses are as follows:

1. Rapid Urination

The force of urine flow may be strong, which can easily generate a large amount of foam. This type of foam typically lasts for a short time and quickly disappears, so it usually does not require excessive concern.

2. Concentrated Urine

If fluid intake is insufficient or if there has been a prolonged period without urination, urine may become concentrated, increasing the concentration of metabolic waste products. This change can alter the surface tension of urine, leading to foam formation. It is recommended to increase water intake, maintain diluted urine, and urinate regularly to avoid prolonged urine retention, which can help improve these symptoms.

3. Urethritis

This condition may be associated with factors such as excessive alcohol consumption or prolonged sitting. When urethritis develops, the levels of white blood cells and bacteria in the urine may increase, altering the urine's surface tension and resulting in foam. Symptoms may also include frequent urination and urgency. Patients are advised to follow medical instructions when using medications such as cefixime granules, roxithromycin tablets, or azithromycin capsules for treatment.

4. Glomerulonephritis

This may be related to improper use of nephrotoxic drugs or poor dietary habits. The disease can damage the glomerular filtration membrane, allowing large amounts of protein to enter the urine and form proteinuria. Foam may appear during urination—often abundant and slow to dissipate. Patients should follow medical advice when taking medications such as methylprednisolone tablets, spironolactone tablets, or furosemide tablets.

5. Diabetes

This condition is generally caused by factors such as viral infections or hypertension. Elevated blood sugar levels lead to increased glucose and ketones in the urine, which can raise the surface tension of urine and result in foam formation. Patients are advised to strictly follow medical instructions when using medications such as insulin aspart injection, insulin degludec injection, or orlistat capsules to manage symptoms.

In daily life, patients are encouraged to follow a low-fat, low-sugar diet, drink plenty of warm water, ensure adequate sleep, and engage in moderate physical exercise, such as running or walking, which may benefit recovery.